Material Type:
Full Course
Provider:
Rice University
Provider Set:
OpenStax College
Tags:
  • 3' UTR
  • 5' UTR
  • 7-methylguanosine Cap
  • A Branch Site
  • A Horizon
  • ABO Blood Type
  • ACE
  • ACTH
  • AChE
  • ADD
  • ADH
  • ADHD
  • ADP
  • AG Dinucleotide Region
  • AMP
  • ANP
  • APC
  • ASD
  • ATP
  • ATP Formation
  • ATP Hydrolysis
  • ATP Synthase
  • ATP Yield
  • AZT
  • Abduction
  • Abiotic
  • Aboveground Biomass
  • Abscisic Acid
  • Abscission
  • Absorption
  • Absorption Spectrum
  • Abstract
  • Abyssal Zone
  • Acanthostega
  • Accessory Fruit
  • Acclimatization
  • Acellular
  • Acetyl CoA
  • Acetylcholine
  • Acetylcholinesterase
  • Acid
  • Acid Rain
  • Acidophile
  • Acini
  • Acinus
  • Acoelomate
  • Acquired Trait
  • Acromegaly
  • Acrosomal Reaction
  • Actinopterygii
  • Action Potential
  • Action Potential Propagation
  • Activation Energy
  • Activator
  • Active Site
  • Active Transport
  • Acute
  • Adaptation
  • Adaptation to Land
  • Adaptive Evolution
  • Adaptive Immune Response
  • Adaptive Immune System
  • Adaptive Immunity
  • Adaptive Radiation
  • Addison's Disease
  • Adduction
  • Adenosine Triphosphate
  • Adenylate Cyclase
  • Adhesion
  • Adipose Tissue
  • Adrenal Cortex
  • Adrenal Gland
  • Adrenal Medulla
  • Adrenocorticotropic Hormone
  • Adventitious Root
  • Aerobic Respiration
  • Afferent Arteriole
  • Affinity
  • Afrikaner
  • Age Structure
  • Aggregate Fruit
  • Aggressive Display
  • Agricultural Diversity
  • Air Sac
  • Air Sacs
  • Alcohol Fermentation
  • Aldolase
  • Aldosterone
  • Alfred Russel Wallace
  • Alfred Wallace
  • Algal Bloom
  • Alimentary Canal
  • Aliphatic Hydrocarbon
  • Alkaliphile
  • Allantois
  • Allele
  • Allele Frequency
  • Allergies
  • Allergy
  • Allopatric Speciation
  • Allopolyploidy
  • Allosteric Activator
  • Allosteric Inhibition
  • Allosteric Regulator
  • Alpha Cell
  • Alpha-helix Structure
  • Alteration
  • Alternation of Generations
  • Altitudinal Cline
  • Alveolar Duct
  • Alveolar P_(O_2 )
  • Alveolar Sac
  • Alveolar Ventilation
  • Alveolate
  • Alveoli
  • Alveolus
  • Alzheimer's Disease
  • Ambulacral System
  • Amino Acid
  • Amino Acid Derived Hormone
  • Aminoacyl-tRNA Synthetase
  • Aminopeptidase
  • Ammonia
  • Ammonotelic
  • Amnion
  • Amniote
  • Amniote Evolution
  • Amoeba
  • Amoebozoa
  • Amphiarthroses
  • Amphibian
  • Amphibian Evolution
  • Amphiphilic
  • Ampullae of Lorenzini
  • Amygdala
  • Amylase
  • Anabolic Pathway
  • Anaerobic
  • Anaerobic Cellular Respiration
  • Anaerobic Metabolism
  • Analogous Trait
  • Analogy
  • Analytical Model
  • Anaphase
  • Anaphase I
  • Anaphase II
  • Anapsid
  • Anatomical Dead Space
  • Anatomical Shunt
  • Ancient Atmosphere
  • Androecium
  • Androgen
  • Aneuploid
  • Aneuploidy
  • Angina
  • Angiosperm
  • Angiosperm Diversity
  • Angiosperm Evolution
  • Angiosperm Life Cycle
  • Angiosperm Lifecycle
  • Angiosperm Reproduction
  • Angiosperm Sexual Reproduction
  • Angiotensin Converting Enzyme
  • Angiotensin I
  • Angiotensin II
  • Angular Movement
  • Animal Biology
  • Animal Body
  • Animal Body Function
  • Animal Cell
  • Animal Characteristic
  • Animal Classification
  • Animal Development
  • Animal Digestion
  • Animal Diversity
  • Animal Energy
  • Animal Evolution
  • Animal Form
  • Animal Kingdom
  • Animal Parasite
  • Animal Pathogen
  • Animal Phylogeny
  • Animal Physiology
  • Animal Reproduction
  • Animal Size
  • Animal Speed
  • Animal Tissue
  • Anion
  • Annelid
  • Annelid Anatomy
  • Annelid Morphology
  • Annelida
  • Annual
  • Annual Ring
  • Anoxic
  • Antenna Molecule
  • Anterior Pituitary
  • Anther
  • Antheridium
  • Anthony Von Leeuwenhoek
  • Anthophyta
  • Anthozoa
  • Anthropoid
  • Anti-diuretic Hormone
  • Antibiotic
  • Antibiotic Resistance
  • Antibodies
  • Antibody
  • Antibody Class
  • Antibody Function
  • Antibody Structure
  • Anticodon
  • Antidiuretic Hormone
  • Antifungal
  • Antigen
  • Antigen-presenting Cell
  • Antioxidant
  • Antipodal
  • Antiporter
  • Antiviral Drug
  • Anura
  • Anus
  • Anvil
  • Aorta
  • Apex Consumer
  • Aphotic Zone
  • Apical Bud
  • Apical Meristem
  • Apicomplexan
  • Apocrine Gland
  • Apoda
  • Apodemes
  • Apomixis
  • Apoptosis
  • Appendicular Skeleton
  • Applied Science
  • Appositional Growth
  • Aquaporin
  • Aquatic Biome
  • Aquatic Environment
  • Aquatic Influence
  • Arachnoid Mater
  • Arbuscular Mycorrhiza
  • Archaea
  • Archaeopteryx
  • Archaeplastida
  • Archegonium
  • Archenteron
  • Archosaur
  • Arctic Tundra
  • Arcuate Artery
  • Areolar Connective Tissue
  • Aromatic Hydrocarbon
  • Arteriole
  • Artery
  • Arthropod
  • Arthropod Morphology
  • Arthropoda
  • Artificial Plant Reproduction
  • Ascending Limb
  • Asexual Reproduction
  • Asocarp
  • Asomycota
  • Assimilation
  • Assortative Mating
  • Asthma
  • Astrocyte
  • Asymmetry
  • Asymptomatic Infection
  • Atherosclerosis
  • Atmospheric Carbon Dioxide
  • Atom
  • Atomic Mass
  • Atomic Number
  • Atrial Natriuretic Peptide
  • Atrioventricular Valve
  • Atrium
  • Attention Deficit
  • Attention Deficit Disorder
  • Attention Deficit Hyperactivity Disorder
  • Attenuating
  • Audition
  • Auditory Ossicle
  • Australopithecus
  • Autism
  • Autism Spectrum Disorder
  • Autoantibody
  • Autocrine Signal
  • Autoimmune Response
  • Autoimmunity
  • Autoinducer
  • Autonomic Nervous System
  • Autopolyploidy
  • Autosomal Chromosome
  • Autosome
  • Autotroph
  • Auxin
  • Avian Digestion
  • Avidity
  • Axial Skeleton
  • Axillary Bud
  • Axon
  • Axon Hillock
  • Axon Terminal
  • B Cell
  • B Horizon
  • BMR
  • BP
  • BUN
  • Back Mutation
  • Bacteria
  • Bacterial Disease
  • Bacterial Fermentation
  • Bacteriophage
  • Balanced Chemical Equation
  • Ball-and-socket Joint
  • Barcoding
  • Basal Angiosperm
  • Basal Ganglia
  • Basal Metabolic Rate
  • Basal Nuclei
  • Basal Taxon
  • Base
  • Basic Science
  • Basidiocarp
  • Basidiomycota
  • Basidium
  • Basilar Membrane
  • Basophil
  • Bat Pollination
  • Batesian Mimicry
  • Behavioral Biology
  • Behavioral Isolation
  • Beneficial Allele
  • Benthic Realm
  • Beta Cell
  • Beta-pleated Sheet
  • Bicarbonate
  • Bicarbonate Buffer System
  • Biennial
  • Bilateral Symmetry
  • Bile
  • Binary Fission
  • Binomial Nomenclature
  • Biochemistry
  • Biodiversity
  • Biodiversity Crisis
  • Biodiversity Hotspot
  • Biodiversity Preservation
  • Bioenergetics
  • Bioethics
  • Biofilm
  • Biogeochemical Cycle
  • Biogeographer
  • Biogeography
  • Biological Carbon Cycle
  • Biological Carbon Pump
  • Biological Macromolecule
  • Biological Macromolecules
  • Biological Magnification
  • Biological Molecules
  • Biological Nitrogen Fixation
  • Biological Species Concept
  • Biology
  • Biology for Majors
  • Bioluminescence
  • Biomagnification
  • Biomarker
  • Biomass
  • Biome
  • Bioremediation
  • Biosphere
  • Biotechnology
  • Biotic
  • Biotic Potential
  • Bipolar Neuron
  • Biramous Appendage
  • Bird
  • Bird Evolution
  • Bird Pollination
  • Birth
  • Birth Control
  • Birth Rate
  • Biscuspid Valve
  • Bitter
  • Black Death
  • Blastocyst
  • Blastopore
  • Blastula
  • Blending Inheritance
  • Blood
  • Blood Calcium Level
  • Blood Flow
  • Blood Glucose
  • Blood Pressure
  • Blood Pressure Regulation
  • Blood Type
  • Blood Urea Nitrogen
  • Blood Vessel
  • Blue Light
  • Blue Light Response
  • Body Cavity
  • Body Defense
  • Body Motility
  • Body Plan
  • Body Plane
  • Body Regulation
  • Body Symmetry
  • Bohr Model
  • Boiling Point
  • Bolus
  • Bone
  • Bone Cell
  • Bone Growth
  • Bone Remodeling
  • Bone Repair
  • Bone Tissue
  • Bone Type
  • Bony Fish
  • Boreal Forest
  • Botany
  • Bottleneck Effect
  • Botulism
  • Bowman's Capsule
  • Boyle’s Law
  • Brachiation
  • Brain
  • Brain-computer Interface
  • Brainstem
  • Branch Point
  • Bronchi
  • Bronchiole
  • Bronchus
  • Brown Algae
  • Brumation
  • Bryophyte
  • Bryophyte Lifecycle
  • Bubonic Plague
  • Budding
  • Buffer
  • Bulb
  • Bulboid Corpuscle
  • Bulbourethral Gland
  • Bulbous Corpuscle
  • Bulk Transport
  • Bush Meat
  • C Horizon
  • C-protein-linked Receptor
  • C. Elegans
  • CA-MRSA
  • CAAT Box
  • CAMP
  • CAMP-dependent Kinase
  • CAP
  • CITES
  • CLASS
  • CNS
  • CSF
  • CTL
  • Caecilian
  • Calcification
  • Calcitonin
  • Calf Bone
  • Calorie
  • Calvin Cycle
  • Calvin-Benson Cycle
  • Calyx
  • Cambrian Explosion
  • Cambrian Period
  • Cancer
  • Cancer Biologist
  • Candela
  • Canopy
  • Capillary
  • Capillary Action
  • Capillary Bed
  • Capsid
  • Capsomeres
  • Capsule
  • Captacula
  • Captaculae
  • Cararrhini
  • Carbaminohemoglobin
  • Carbohydrate
  • Carbohydrate Classification
  • Carbohydrate Digestion
  • Carbohydrate Metabolic Pathway
  • Carbohydrates
  • Carbon
  • Carbon Cycle
  • Carbon Dating
  • Carbon Dioxide
  • Carbon Fixation
  • Carbon Monoxide
  • Carbonic Acid Intermediate
  • Carbonic Acid-bicarbonate Buffer System
  • Carbonic Anhydrase
  • Carboniferous Period
  • Carboxypeptidase
  • Cardiac Arrest
  • Cardiac Cycle
  • Cardiac Muscle
  • Cardiac Muscle Tissue
  • Cardiac Output
  • Cardiologist
  • Cardiomyocyte
  • Carl Linnaeus
  • Carl Woese
  • Carnivore
  • Carotenoid
  • Carpel
  • Carrier Protein
  • Carrying Capacity
  • Cartilage
  • Cartilaginous Fish
  • Cartilaginous Joint
  • Casineria
  • Casparian Strip
  • Catabolic Pathway
  • Catabolite Activator Protein
  • Catarrhini
  • Cation
  • Cdk
  • Cell
  • Cell Communication
  • Cell Cycle
  • Cell Cycle Checkpoint
  • Cell Cycle Control
  • Cell Cycle Regulation
  • Cell Division
  • Cell Function
  • Cell Growth
  • Cell Membranes
  • Cell Motion
  • Cell Necrosis
  • Cell Plate
  • Cell Recognition
  • Cell Reproduction
  • Cell Size
  • Cell Structure
  • Cell Suicide
  • Cell Theory
  • Cell Wall
  • Cell-mediated Immune Response
  • Cell-surface Receptor
  • Cells
  • Cellular Activity
  • Cellular Cloning
  • Cellular Energy
  • Cellular Metabolism
  • Cellular Receptor
  • Cellular Respiration
  • Cellulose
  • CentiMorgan
  • Central Dogma
  • Central Nervous System
  • Central Vacuole
  • Centriole
  • Centromere
  • Centrosome
  • Cephalic Phase
  • Cephalochordata
  • Cephalothorax
  • Cerebellum
  • Cerebral Cortex
  • Cerebral Hemisphere
  • Cerebrospinal Fluid
  • Chaetae
  • Chain Termination Method
  • Channel
  • Channel Protein
  • Chaparral
  • Chaperone
  • Chaperones
  • Characteristic
  • Charales
  • Chargaff's Rules
  • Charged Membrane
  • Charles Darwin
  • Charophyte
  • Checkpoint
  • Chelicerata
  • Chemical Bond
  • Chemical Diversity
  • Chemical Energy
  • Chemical Reaction
  • Chemical Reactivity
  • Chemical Signal
  • Chemical Synapse
  • Chemiosmosis
  • Chemisosmosis
  • Chemistry
  • Chemoautotroph
  • Chemosynthetic Organism
  • Chemotroph
  • Chesapeake Bay Ecosystem
  • Chiasma
  • Chiasmata
  • Chitin
  • Chlorarachniophytes
  • Chloride Shift
  • Chlorophyll
  • Chlorophyll a
  • Chlorophyll b
  • Chlorophyte
  • Chloroplast
  • Cholecystokinin
  • Chondrichthyes
  • Chondrocytes
  • Chordata
  • Chordate
  • Chorion
  • Choroid Plexus
  • Chromalveolata
  • Chromatid
  • Chromatin
  • Chromophore
  • Chromosomal Sympatric Speciation
  • Chromosomal Theory
  • Chromosomal Theory of Inheritance
  • Chromosome
  • Chromosome 18 Inversion
  • Chromosome Aberration
  • Chromosome Compaction
  • Chromosome Disorder
  • Chromosome Identification
  • Chromosome Inversion
  • Chromosome Map
  • Chromosome Nondisjunction
  • Chromosome Number Disorder
  • Chronic
  • Chylomicron
  • Chyme
  • Chymotrypsin
  • Chytrid
  • Chytridiomycosis
  • Chytridiomycota
  • Cilia
  • Ciliate
  • Cilium
  • Cingulate Gyrus
  • Cingulated Gyrus
  • Circadian
  • Circular Pathway
  • Circulation
  • Circulatory System
  • Circumduction
  • Cis-acting Element
  • Citric Acid Cycle
  • Clade
  • Cladistic Method
  • Cladistics
  • Cladistics System
  • Classical Conditioning
  • Classical Genetics
  • Classification Levels
  • Classification System
  • Clathrate
  • Clathrin
  • Clavicle
  • Clay
  • Cleavage
  • Cleavage Furrow
  • Climate
  • Climate Change
  • Climax Community
  • Cline
  • Clinical Trial
  • Clitellum
  • Clitoris
  • Cloaca
  • Clonal Selection
  • Clone
  • Closed Circulatory System
  • Closed System
  • Club Fungi
  • Club Moss
  • Cnidaria
  • Cnidarian
  • Cnidocyte
  • Co-transport
  • Coagulation
  • Codominance
  • Codon
  • Coelenteron
  • Coelom
  • Coelom Evolution
  • Coelomate
  • Coenocytic Hypha
  • Coenzyme
  • Coenzyme a
  • Coevolution of Plants and Mycorrhizae
  • Cofactor
  • Cognitive Learning
  • Cohesin
  • Cohesion
  • Coleoptile
  • Coleorhiza
  • Colinear
  • College Biology
  • Collenchyma Cell
  • Colloid
  • Columnar Epithelia
  • Commensalism
  • Common Side-blotched Lizards
  • Community
  • Community Ecology
  • Community Structure
  • Community Succession
  • Compact Bone Tissue
  • Competitive Exclusion
  • Competitive Exclusion Principle
  • Competitive Inhibition
  • Complement System
  • Complete Flower
  • Complex I
  • Complex II
  • Complex III
  • Complex IV
  • Complex Plant Tissue
  • Complex Tissue Structure
  • Compliance
  • Compound
  • Compound Leaf
  • Concentration Gradient
  • Conceptual Model
  • Conclusion
  • Condensation
  • Condensation Reaction
  • Condensin
  • Conditioned Behavior
  • Condyloid Joint
  • Cone
  • Conifer Life Cycle
  • Conifer Lifecycle
  • Conjugated Fungi
  • Conjugation
  • Connective Tissue
  • Consensus
  • Conservation
  • Conspecific
  • Conspiral
  • Contig
  • Continuous Variation
  • Contour Feather
  • Contraception
  • Contractile Vacuole
  • Control
  • Control of Homeostasis
  • Convergent Evolution
  • Coral Reef
  • Core Enzyme
  • Corm
  • Cornea
  • Corolla
  • Coronal Plane
  • Coronary Artery
  • Coronary Vein
  • Corpus Callosum
  • Cortex
  • Cortical Nephron
  • Cortical Radiate Artery
  • Corticosteroid
  • Cortisol
  • Cotyledon
  • Countercurrent Exchanger
  • Countercurrent Multiplier
  • Courtship Display
  • Covalent Bond
  • Coxal Bone
  • Cranial Bone
  • Cranial Nerve
  • Craniata
  • Craniate
  • Cranium
  • Crocodilia
  • Crop
  • Cross-pollination
  • Cross-reactivity
  • Crossing Over
  • Crossover
  • Crustacea
  • Cryogenian Period
  • Cryptochrome
  • Cryptofauna
  • Ctenidia
  • Cuboidal Epithelia
  • Cubozoa
  • Cushing's Disease
  • Cutaneous Respiration
  • Cuticle
  • Cutting
  • Cyanobacteria
  • Cycad
  • Cyclic AMP
  • Cyclin
  • Cyclin-dependent Kinase
  • Cypris
  • Cytochrome Complex
  • Cytochrome c
  • Cytokine
  • Cytokine Release
  • Cytokinesis
  • Cytokinin
  • Cytopathic
  • Cytoplasm
  • Cytoplasmic Streaming
  • Cytoskeleton
  • Cytosol
  • Cytotechnologist
  • Cytotoxic T Lymphocyte
  • DAG
  • DCT
  • DNA
  • DNA Analysis
  • DNA Barcoding
  • DNA Extraction
  • DNA Function
  • DNA Methylation
  • DNA Microarray
  • DNA Repair
  • DNA Replication
  • DNA Sequencing
  • DNA Structure
  • DNA Transformation
  • Dark Reaction
  • Daughter Nuclei
  • Dead Sea
  • Dead Space
  • Dead Zone
  • Death Rate
  • Decalcification
  • Decomposer
  • Decomposition
  • Deductive Reasoning
  • Defense Mechanism
  • Deforestation
  • Degeneracy
  • Dehydration
  • Dehydration Reaction
  • Dehydration Synthesis
  • Delivery
  • Delta G
  • Demography
  • Denaturation
  • Dendrite
  • Dendritic Cell
  • Denitrification
  • Density-dependent Growth
  • Density-dependent Regulation
  • Density-independent Growth
  • Density-independent Regulation
  • Dentary
  • Deoxynucleotide
  • Deoxyribonucleic Acid
  • Dephosphorylation
  • Depolarization
  • Depression
  • Dermal Tissue
  • Descending Limb
  • Descriptive Science
  • Desmosome
  • Determinate Cleavage
  • Detrital Food Web
  • Deuteromycota
  • Deuterostome
  • Development of the Seed
  • Diabetes Insipidus
  • Diabetes Mellitus
  • Diabetogenic Effect
  • Diacylglycerol
  • Dialysis
  • Diaphragm
  • Diaphysis
  • Diarthroses
  • Diastole
  • Diatom
  • Dicer
  • Dideoxynucleotide
  • Diffusion
  • Digestion
  • Digestion Regulation
  • Digestive Process
  • Digestive System
  • Dihybrid
  • Dikaryon
  • Dimer
  • Dimerization
  • Dinoflagellate
  • Dioecious
  • Dipeptidase
  • Diphyodont
  • Diploblast
  • Diploid
  • Diploid Dominant
  • Diploid Zygote
  • Diplomonad
  • Diplontic
  • Direct Diffusion
  • Directional Selection
  • Disaccharide
  • Discontinuous Variation
  • Discussion
  • Disease Migration
  • Disease Prediction
  • Disorder
  • Dispersal
  • Dissociation
  • Distal Convoluted Tubule
  • Distraction Display
  • Divergent Evolution
  • Diversifying Selection
  • Divisions of Land Plants
  • Domain
  • Dominant
  • Dominant Allele
  • Dominant Lethal
  • Dominant Phenotype
  • Dormancy
  • Dorsal Cavity
  • Dorsal Hollow Nerve Cord
  • Dorsiflexion
  • Double Circulation
  • Double Fertilization
  • Double Helix
  • Down Feather
  • Down-regulation
  • Downstream
  • Duodenum
  • Dura Mater
  • Dutch Elm Disease
  • E. O. Wilson
  • ECG
  • ELISA
  • EPO
  • EPSP
  • ER
  • Ear Drum
  • Early Plant Life
  • Early Reproduction
  • Eccrine Gland
  • Echinoderm
  • Echinoderm Anatomy
  • Echinoderm Excretory System
  • Echinoderm Morphology
  • Echinoderm Nervous System
  • Echinoderm Reproduction
  • Echinodermata
  • Ecological Efficiency
  • Ecological Pyramid
  • Ecological Research
  • Ecological Resilience
  • Ecological Resistance
  • Ecological Study
  • Ecologist
  • Ecology
  • Ecology Study
  • Ecology of Ecosystems
  • Ecosystem
  • Ecosystem Diversity
  • Ecosystem Dynamics
  • Ecosystem Ecology
  • Ecosystem Energy
  • Ecosystem Energy Flow
  • Ecosystem Energy Model
  • Ecosystem Experiment
  • Ecosystem Model
  • Ecosystem Modeling
  • Ecosystem Service
  • Ecosystem Structure
  • Ecosystems
  • Ectoderm
  • Ectomycorrhiza
  • Ectotherm
  • Ediacaran Period
  • Effector Cell
  • Efferent Arteriole
  • Egress
  • Elastase
  • Elastic Recoil
  • Elastic Work
  • Electrical Synapse
  • Electrocardiogram
  • Electrochemical Gradient
  • Electrolyte
  • Electrolyte Transport
  • Electrolytes
  • Electromagnetic Spectrum
  • Electron
  • Electron Configuration
  • Electron Microscope
  • Electron Orbital
  • Electron Transfer
  • Electron Transport Chain
  • Electronegativity
  • Electrophoresis
  • Element
  • Elevation
  • Elimination
  • Elizabeth Blackburn
  • Eltonian Pyramid
  • Embryo
  • Embryological Development
  • Embryonic Animal Tissue
  • Embryonic Development
  • Embryophyte
  • Emergent Vegetation
  • Emerging Disease
  • Emsleyan/Mertensian Mimicry
  • Enantiomers
  • Enantiornithes
  • Endangered Species Act
  • Endemic
  • Endemic Disease
  • Endemic Species
  • Endergonic
  • Endergonic Reaction
  • Endocardium
  • Endocarp
  • Endochondral Ossification
  • Endocrine
  • Endocrine Cell
  • Endocrine Gland
  • Endocrine System
  • Endocrinologist
  • Endocytosis
  • Endoderm
  • Endodermis
  • Endomembrane System
  • Endoplasmic Reticulum
  • Endoskeleton
  • Endosperm
  • Endosymbiosis
  • Endotherm
  • Energy
  • Energy Budget
  • Energy Change
  • Energy Currency
  • Energy Cycle
  • Energy From Fat
  • Energy Requirements
  • Energy Source
  • Energy System
  • Energy Transfer
  • Energy of Activation
  • Enhancer
  • Enolase
  • Enterocoelous Coelom
  • Enterocoely
  • Enthalpy
  • Entropy
  • Envelope
  • Enveloped Virions
  • Enveloped Viruses
  • Environmental Adaptation
  • Environmental Disturbance
  • Environmental Variance
  • Enzymatic Cascade
  • Enzyme
  • Enzyme Active Site
  • Enzyme Function
  • Enzyme Regulation
  • Enzyme-linked Immunosorbent Assay
  • Enzyme-linked Receptor
  • Eosinophil
  • Ependymal
  • Epicardium
  • Epicotyl
  • Epidemic
  • Epidemiologist
  • Epigeal Germination
  • Epigenetic
  • Epigenetic Control
  • Epigenetic Gene Regulation
  • Epigenetic Regulation
  • Epilepsy
  • Epinephrine
  • Epiphyseal Plate
  • Epiphyses
  • Epiphyte
  • Epistasis
  • Epistatic Effect
  • Epithelial Tissue
  • Epitope
  • Equilibrium
  • Erythropoietin
  • Esophagus
  • Essential Element
  • Essential Nutrient
  • Estivation
  • Estrogen
  • Estuaries
  • Estuary
  • Ethnobotanist
  • Ethology
  • Ethylene
  • Etoliation
  • Eucoelomate
  • Eudicot
  • Eukaryote
  • Eukaryote Evolution
  • Eukaryote HGT
  • Eukaryote Origin
  • Eukaryote-first Hypothesis
  • Eukaryotes
  • Eukaryotic Cell
  • Eukaryotic DNA
  • Eukaryotic Epigenetic Gene Regulation
  • Eukaryotic Gene Expression
  • Eukaryotic Gene Regulation
  • Eukaryotic Genome
  • Eukaryotic Initiation Factor-2
  • Eukaryotic Post-transcriptional Gene Regulation
  • Eukaryotic Post-translational Gene Regulation
  • Eukaryotic Transcription
  • Eukaryotic Transcriptional Gene Regulation
  • Eukaryotic Translational Gene Regulation
  • Eumatozoa
  • Euploid
  • Eutherian Mammal
  • Eutheruan Mammal
  • Eutrophication
  • Evaporation
  • Evapotranspiration
  • Eversion
  • Evolution
  • Evolution Evidence
  • Evolution Theory
  • Evolution of Land Plants
  • Evolution of Reproduction
  • Evolutionary Fitness (also, Darwinian Fitness)
  • Evolutionary Relationships
  • Evolutionary Thought
  • Evolving New Species
  • Excavata
  • Excitation–contraction Coupling
  • Excitatory Postsynaptic Potential
  • Excretory System
  • Exergonic
  • Exergonic Reaction
  • Exhalation
  • Exine
  • Exocarp
  • Exocrine Gland
  • Exocrine System
  • Exocytosis
  • Exon
  • Exoskeleton
  • Exotic Species
  • Experiment
  • Expiratory Reserve Volume
  • Exponential Growth
  • Extant
  • Extension
  • External Fertilization
  • Extinct
  • Extinct Plant
  • Extinction
  • Extinction Rate
  • Extracellular Domain
  • Extracellular Matrix
  • Extremophile
  • Eye
  • Eye Anatomy
  • F1
  • F2
  • FAD
  • FADH
  • FEV1/FVC Ratio
  • FSH
  • Facial Bone
  • Facilitated Transport
  • Fact
  • Fall Turnover
  • Fall and Spring Turnover
  • Fallout
  • False Negative
  • Falsifiable
  • Family
  • Fanconi Anemia (FA)
  • Fat
  • Fat Digestion
  • Fatty Acid
  • Fecundity
  • Feedback Inhibition
  • Female Gamete
  • Female Gametophyte
  • Female Hormones
  • Female Reproductive Anatomy
  • Femur
  • Fermentation
  • Fern
  • Fern Lifecycle
  • Fertilization
  • Fetal Development
  • Fibrous Connective Tissue
  • Fibrous Joint
  • Fibrous Root
  • Fibula
  • Field Biologist
  • Filament
  • Filamentous Viruses
  • First Filial Generation
  • First Gap
  • First Law of Thermodynamics
  • First Messenger
  • Fish
  • Fisherian Runaway Model
  • Fisher’s Runaway Model
  • Fishes
  • Fission
  • Fitness
  • Five Senses
  • Fixation
  • Fixed Action Pattern
  • Flagella
  • Flagellum
  • Flame Cell
  • Flat Bone
  • Flatworm
  • Flavin
  • Flexion
  • Flight Feather
  • Float
  • Flow-resistive
  • Flower
  • Flower Evolution
  • Flower Reproduction
  • Flower Structure
  • Flu Shot
  • Flu Strain
  • Fluid Mosaic Model
  • Follicle Stimulating Hormone
  • Follicle-stimulating Hormone (FSH)
  • Food Chain
  • Food Chain Energy
  • Food Energy
  • Food Fungi
  • Food Production
  • Food Requirements
  • Food Web
  • Food Web Energy
  • Foodborne Disease
  • Foraging
  • Foram
  • Foraminiferan
  • Forced Expiratory Volume
  • Forced Vital Capacity
  • Forearm
  • Foreign DNA
  • Forked-line Method
  • Foundation Species
  • Founder Effect
  • Fovea
  • Fragmentation
  • Francis Crick
  • Free Energy
  • Free Nerve Ending
  • Frequency-dependent Selection
  • Freshwater Biome
  • Friedrich Miescher
  • Frog
  • Frontal Lobe
  • Frontal Plane
  • Fruit
  • Fruit Development
  • Fruit Dispersal
  • Fruit Evolution
  • Fruit Type
  • FtsZ
  • Fumarate
  • Functional Group
  • Functional Residual Capacity
  • Functional Vital Capacity
  • Fungal Infection
  • Fungal Parasite
  • Fungal Pathogen
  • Fungi
  • Fungi Asexual Reproduction
  • Fungi Beverage
  • Fungi Cell Structure
  • Fungi Characteristics
  • Fungi Ecology
  • Fungi Growth
  • Fungi Habitat
  • Fungi Nutrition
  • Fungi Reproduction
  • Fungi Sexual Reproduction
  • Fungi and Roots
  • Fungivore
  • Fungus
  • Fungus Animal Mutualism
  • Fungus Plant Mutualism
  • Furcula
  • Fusiform
  • Fusion
  • G-protein
  • G0 Phase
  • G1
  • G1 Checkpoint
  • G1 Phase
  • G2
  • G2 Checkpoint
  • G2 Phase
  • GC-rich Box
  • GFR
  • GH
  • GHIH
  • GHRH
  • GLUT Protein
  • GMO
  • GTA
  • GTP
  • GU Dinucleotide Signal
  • Gallbladder
  • Galls
  • Gametangium
  • Gamete
  • Gamete Genotype
  • Gametic Barrier
  • Gametogenesis
  • Gametophyte
  • Gap Junction
  • Garden Pea
  • Garden Pea Hybridization
  • Garth Nicholson
  • Gas
  • Gas Equation
  • Gas Exchange
  • Gas Pressure
  • Gastric Inhibitory Peptide
  • Gastric Phase
  • Gastrin
  • Gastrovascular Cavity
  • Gastrula
  • Gastrulation
  • Gel Electrophoresis
  • Gemma
  • Gemmule
  • Gene
  • Gene Cross
  • Gene Distance
  • Gene Expression
  • Gene Expression Regulation
  • Gene Flow
  • Gene Pool
  • Gene Regulation
  • Gene Targeting
  • Gene Therapy
  • Gene Transfer Agent
  • Genes
  • Genetic Code
  • Genetic Diagnosis
  • Genetic Diversity
  • Genetic Drift
  • Genetic Engineering
  • Genetic Linkage
  • Genetic Map
  • Genetic Recombination
  • Genetic Structure
  • Genetic Testing
  • Genetic Variance
  • Genetic Variation
  • Genetically Modified Organism
  • Geneticist
  • Genetics
  • Genome
  • Genome Annotation
  • Genome Fusion
  • Genomic DNA
  • Genomics
  • Genotype
  • Genus
  • Geographical Variation
  • Geological Carbon Cycle
  • Geological Climate Change
  • Geometric Isomer
  • Germ Cell
  • Germ Layer
  • Germ Layers
  • Germination
  • Gestation
  • Gibberellin
  • Gibbs Free Energy
  • Gigantism
  • Gill Circulation
  • Gills
  • Gingko Biloba
  • Gingkophyte
  • Gizzard
  • Glabrous
  • Glia
  • Glia Function
  • Glia Types
  • Glial Cell
  • Gliding Movement
  • Global Climate
  • Global Climate Change
  • Global Warming
  • Glomeromycota
  • Glomerular Filtration
  • Glomerular Filtration Rate
  • Glomerulus
  • Glucagon
  • Glucocorticoid
  • Gluconeogenesis
  • Glucose
  • Glucose Breakdown
  • Glucose Metabolism
  • Glucose Transport Protein
  • Glucose-sparing Effect
  • Glycogen
  • Glycogenolysis
  • Glycolipid
  • Glycolysis
  • Glycolysis Regulation
  • Glycoprotein
  • Glycosidic Bond
  • GnRH
  • Gnathostome
  • Gnetophyte
  • Goiter
  • Golgi Apparatus
  • Golgi Tendon Organ
  • Gomphoses
  • Gonadotropin
  • Gonadotropin-releasing Hormone
  • Good Genes Hypothesis
  • Gout
  • Gradual Speciation Model
  • Gradual Species Model
  • Grafting
  • Gram Molecular Weight
  • Gram Negative
  • Gram Positive
  • Grana
  • Granular Cell
  • Granum
  • Granzyme
  • Gravitropism
  • Grazing Food Web
  • Green Algae
  • Green Algae Reproduction
  • Greenhouse Effect
  • Greenhouse Gas
  • Gregor Mendel
  • Gross Primary Productivity
  • Ground Tissue
  • Group I
  • Group II
  • Group III
  • Group IV
  • Group VI
  • Group VII
  • Group v
  • Growth Factor
  • Growth Hormone
  • Growth Hormone-inhibiting Hormone
  • Growth Hormone-releasing Hormone
  • Growth Regulation
  • Growth Regulator
  • Guanine Diphosphate
  • Guanine Triphosphate
  • Guard Cell
  • Gustation
  • Guttation
  • Gymnosperm
  • Gymnosperm Diversity
  • Gymnosperm Evolution
  • Gymnosperm Reproduction
  • Gymnosperm Seed
  • Gymnosperm Sexual Reproduction
  • Gynoecium
  • Gyri
  • Gyrus
  • HGT
  • HIV
  • Habitat Isolation
  • Habitat Loss
  • Habitat Restoration
  • Habituation
  • Hagfish
  • Hairpin
  • Halophile
  • Hammer
  • Handicap Principle
  • Haplodiplodontic
  • Haploid
  • Haploid Dominant
  • Haplontic
  • Hardy-Weinberg Equilibrium
  • Haustoria
  • Haversian Canal
  • Haze-effect Cooling
  • Head and Tail Viruses
  • Hearing
  • Heart
  • Heart Anatomy
  • Heart Attack
  • Heart Structure
  • Heat
  • Heat Conservation
  • Heat Dissipation
  • Heat Energy
  • Heat of Vaporization of Water
  • Heirloom Plant
  • Heirloom Seed
  • Helicase
  • Helper T Cell
  • Helper T Lymphocyte
  • Heme Group
  • Hemizygous
  • Hemocoel
  • Hemoglobin
  • Hemolymph
  • Herb
  • Herbaceous Plant
  • Herbivore
  • Herbivory
  • Heredity
  • Heritability
  • Hermaphrodite
  • Hermaphroditism
  • Heteroautotroph
  • Heterodont
  • Heterogeneity
  • Heterospecific
  • Heterosporous
  • Heterosporous Seed Plant
  • Heterothallic
  • Heterotroph
  • Heterozygous
  • Hexapoda
  • Hexokinase
  • Hibernation
  • Hilum
  • Hinge Joint
  • Hip Bone
  • Hippocampus
  • Histone
  • Histone Acetylation
  • Histone Modification
  • Histone Protein
  • Holistic Ecosystem Model
  • Holoblastic
  • Holoenzyme
  • Homeobox Gene
  • Homeostasis
  • Homeostatic Process
  • Hominin
  • Hominoid
  • Homo
  • Homo Sapiens
  • Homo Sapiens Sapiens
  • Homologous Chromosome
  • Homologous Recombination
  • Homologous Structure
  • Homologous Trait
  • Homoplasy
  • Homosporous
  • Homothallic
  • Homozygous
  • Honest Signal
  • Horizon
  • Horizontal Gene Transfer
  • Horizontal Plane
  • Horizontal Transmission
  • Hormonal Response
  • Hormonal Stimuli
  • Hormone
  • Hormone Production
  • Hormone Receptor
  • Hormone Regulation
  • Hornwort
  • Horsetail
  • Horticulture
  • Host
  • Host DNA
  • Hox Gene
  • Hugh Davson
  • Human Beta Chorionic Gonadotropin
  • Human Birth
  • Human Carrying Capacity
  • Human Population
  • Human Population Growth
  • Human Pregnancy
  • Human Reproductive Anatomy
  • Human Skeletal System
  • Human Skeleton
  • Humerus
  • Humoral Immune Response
  • Humoral Stimuli
  • Humus
  • Huntington's Disease
  • Hybrid
  • Hybrid Sterility
  • Hybrid Viability
  • Hybrid Zone
  • Hybridization
  • Hydrocarbon
  • Hydrocarbon Chain
  • Hydrogen Bond
  • Hydrogenosome
  • Hydrologic Cycle
  • Hydrolysis
  • Hydrolysis Reaction
  • Hydrophilic
  • Hydrophilic Head
  • Hydrophobic
  • Hydrophobic Tail
  • Hydroponics
  • Hydrostatic Skeleton
  • Hydrothermal Vent
  • Hydrozoa
  • Hylobatidae
  • Hylonomus
  • Hyoid Bone
  • Hyperextension
  • Hyperglycemia
  • Hyperopia
  • Hyperplasia
  • Hyperpolarization
  • Hypersensitivities
  • Hypersensitivity
  • Hyperthermophile
  • Hyperthyroidism
  • Hypertonic
  • Hypha
  • Hyphae
  • Hypocotyl
  • Hypogeal Germination
  • Hypoglycemia
  • Hypophyseal Portal System
  • Hypoplasia
  • Hypothalamus
  • Hypothesis
  • Hypothesis-based Science
  • Hypothyroidism
  • Hypotonic
  • IGF
  • IP3
  • IPSP
  • Ice
  • Ileum
  • Immune Response
  • Immune System
  • Immune Tolerance
  • Immunity
  • Immunodeficiency
  • Immunologist
  • Imperfect Fungi
  • Importance of Biodiversity
  • Imprinting
  • Inbreeding
  • Inbreeding Depression
  • Incompatibility
  • Incompatibility Gene
  • Incomplete Dominance
  • Incus
  • Independent Assortment
  • Indeterminate Cleavage
  • Induced Fit
  • Induced Mutation
  • Inducer
  • Inducible Operon
  • Inductive Reasoning
  • Industrial Fungi
  • Industrial Plant Use
  • Industrial Revolution
  • Inert Gas
  • Inferior Vena Cava
  • Infertility
  • Inflammation
  • Infundibulum
  • Ingestion
  • Inhalation
  • Inheritance
  • Inherited Disorder
  • Inhibin
  • Inhibition of Cell Division
  • Inhibitor
  • Inhibitory Postsynaptic Potential
  • Inhibitory Postsynaptic Potential IPSP
  • Initiation Complex
  • Initiation Site
  • Initiation of Cell Division
  • Initiator TRNA
  • Innate Behavior
  • Innate Immune Response
  • Innate Immune System
  • Innate Immunity
  • Inner Cell Mass
  • Inner Ear
  • Inorganic Compound
  • Inorganic Nutrient
  • Inositol Phospholipid
  • Inositol Triphosphate
  • Insect Pollination
  • Insectivorous
  • Insectivorous Plant
  • Inspiratory Capacity
  • Inspiratory Reserve Volume
  • Insulin
  • Insulin-like Growth Factors
  • Integral Protein
  • Integrin
  • Integument
  • Integumentary System
  • Intercalary Meristem
  • Intercellular Signal
  • Intercostal Muscle
  • Interdisciplinary Ecology
  • Interferon
  • Interkinesis
  • Interlobar Artery
  • Intermediate Filament
  • Intermittent
  • Internal Fertilization
  • Internal Receptor
  • Internode
  • Interphase
  • Intersexual Selection
  • Interspecific Competition
  • Interstitial Cell of Leydig
  • Interstitial Fluid
  • Intertidal Zone
  • Intervertebral Disc
  • Intestinal Phase
  • Intine
  • Intracellular Hormone Receptor
  • Intracellular Mediator
  • Intracellular Receptor
  • Intracellular Signal
  • Intramembranous Ossification
  • Intrapleural Space
  • Intrasexual Selection
  • Intraspecific Competition
  • Introduction
  • Intron
  • Inversion
  • Invertebrata
  • Invertebrate
  • Invertebrates
  • Ion
  • Ion Channel-linked Receptor
  • Ionic Bond
  • Iris
  • Irregular Bone
  • Irreversible Chemical Reaction
  • Island Biogeography
  • Islets of Langerhans
  • Isomerase
  • Isomers
  • Isometric Viruses
  • Isotonic
  • Isotope
  • Isthmus
  • Iteroparity
  • J-shaped Growth Curve
  • James Danielli
  • James Lake
  • James Watson
  • Jasmonate
  • Jawed Fish
  • Jawless Fish
  • Jean-Baptiste Lamarck
  • Jejunum
  • Johannes Diderik Van Der Waals
  • Joint
  • Joint Function
  • Joint Movement
  • Joint Structure
  • Josiah Willard Gibbs
  • Just Noticeable Difference
  • Juxtaglomerular Complex
  • Juxtamedullary Nephron
  • K-selected Species
  • Karyogamy
  • Karyogram
  • Karyokinesis
  • Karyotype
  • Keratinocyte
  • Keystone Species
  • Kidney
  • Kidney Function
  • Kidney Physiology
  • Killed Vaccine
  • Kin Selection
  • Kinase
  • Kinase PKC
  • Kinesis
  • Kinesthesia
  • Kinetic Energy
  • Kinetochore
  • Kinetoplast
  • Kingdom
  • Kingdom Animalia
  • Kneecap
  • Kozak's Rules
  • Krause End Bulb
  • Krebs Cycle
  • Kyoto Protocol
  • LH
  • LTD
  • LTP
  • Labia Majora
  • Labia Minora
  • Labor
  • Labyrinth
  • Lac Operon
  • Lactase
  • Lactate Dehydrogenase
  • Lactic Acid Fermentation
  • Lacunae
  • Lagging Strand
  • Lake
  • Lamellae
  • Lamina
  • Laminaria
  • Lamprey
  • Lancelet
  • Land Adaptation
  • Land Plant Adaptations
  • Landscape Designer
  • Large 60S Ribosomal Subunit
  • Large Intestine
  • Larynx
  • Late Reproduction
  • Latency
  • Lateral Gene Transfer
  • Lateral Line
  • Lateral Meristem
  • Lateral Rotation
  • Latitudinal Cline
  • Law of Dominance
  • Law of Independent Assortment
  • Law of Mass Action
  • Law of Segregation
  • Law of Thermodynamics
  • Laws of Inheritance
  • Laws of Probability
  • Layering
  • Lead Structure
  • Leading Strand
  • Leaf
  • Leaf Adaptation
  • Leaf Anatomy
  • Leaf Arrangement
  • Leaf Form
  • Leaf Function
  • Leaf Structure
  • Leaf Vein
  • Learned Behavior
  • Leaves
  • Lens
  • Lenticel
  • Lepidosaur
  • Leptin
  • Lethality
  • Lichen
  • Life
  • Life History
  • Life History Pattern
  • Life Science
  • Life Table
  • Lifecycle
  • Ligand
  • Ligand Binding
  • Ligase
  • Light
  • Light Energy
  • Light Microscope
  • Light Transduction
  • Light Wavelengths
  • Light-dependent Reaction
  • Light-independent Reaction
  • Lignin
  • Limbic System
  • Linear Pathway
  • Linkage
  • Linked Genes
  • Linnaean System
  • Lipase
  • Lipid
  • Lipid Derived Hormone
  • Lipid Metabolic Pathway
  • Lipids
  • Liquid
  • Litmus Paper
  • Live Vaccine
  • Liver
  • Liverwort
  • Loam
  • Lobe-finned Fish
  • Lobes of the Kidney
  • Lock and Key Model
  • Locomotion
  • Locus
  • Logistic Growth
  • Long Bone
  • Long-term Depression
  • Long-term Potentiation
  • Long-term Stress Response
  • Loop of Henle
  • Loose Connective Tissue
  • Lophotrochozoa
  • Lower Limb
  • Lung Capacity
  • Lung Volume
  • Luteinizing Hormone
  • Lycophyta
  • Lymph
  • Lymph Node
  • Lymphocyte
  • Lysis
  • Lysis Buffer
  • Lysogenic Cycle
  • Lysosome
  • Lytic Cycle
  • M Checkpoint
  • MALT
  • MHC
  • MHC I
  • MHC II
  • MRNA
  • MRSA
  • Maclyn McCarty
  • Macroevolution
  • Macromolecule
  • Macromolecule Synthesis
  • Macromolecules
  • Macronutrient
  • Macrophage
  • Macula Densa
  • Madreporite
  • Main Bronchus
  • Major Depression
  • Major Histocompatability Class I Molecule
  • Major Histocompatability Class II Molecule
  • Male Gametophyte
  • Male Hormones
  • Male Reproductive Anatomy
  • Malleus
  • Malpighian Tube
  • Malpighian Tubule
  • Maltase
  • Mammal
  • Mammal Characteristics
  • Mammal Evolution
  • Mammary Gland
  • Mantle
  • Marilee Ramesh
  • Marine Biome
  • Mark and Recapture
  • Marsupial
  • Mass Extinction
  • Mass Number
  • Mast Cell
  • Materials and Methods
  • Mating Factor
  • Matrix
  • Matrix Proteins
  • Matter
  • Matthias Schleiden
  • Maximal Exhalation
  • Maximum Parsimony
  • Measuring Biodiversity
  • Mechanoreceptor
  • Mechanoreceptor Density
  • Medial Rotation
  • Medulla
  • Medusa
  • Megafauna
  • Megapascal
  • Megaphyll
  • Megasporangium
  • Megaspore
  • Megasporocyte
  • Meiosis
  • Meiosis I
  • Meiosis II
  • Meissner’s Corpuscle
  • Membrane Components
  • Membrane Fluidity
  • Membrane Function
  • Membrane Potential
  • Membrane Structure
  • Memory Cell
  • Mendel
  • Mendelian Cross
  • Mendelian Genetics
  • Meninge
  • Menopause
  • Menstrual Cycle
  • Mental Illness
  • Meristem
  • Meristematic Tissue
  • Merkel's Disc
  • Meroblastic
  • Meselson
  • Mesocarp
  • Mesocosm
  • Mesoderm
  • Mesoglea
  • Mesohyl
  • Mesophyll
  • Messenger RNA
  • Metabolic Pathway
  • Metabolism
  • Metabolism Regulation
  • Metabolism Without Oxygen
  • Metabolome
  • Metabolomics
  • Metagenomics
  • Metamerism
  • Metaphase
  • Metaphase I
  • Metaphase II
  • Metaphase Plate
  • Metatarsal
  • Metazoa
  • Metazoan Phylogenetic Tree
  • MiRNA
  • MicroRNA
  • Microbial Genomics
  • Microbial Mat
  • Microbiologist
  • Microbiology
  • Microcosm
  • Microevolution
  • Microfilament
  • Microglia
  • Micronutrient
  • Microphyll
  • Micropropagation
  • Micropyle
  • Microsatellite Polymorphism
  • Microscope
  • Microscopy
  • Microsporangium
  • Microspore
  • Microsporocyte
  • Microsporophyll
  • Microtubule
  • Microvilli
  • Middle Ear
  • Midsagittal Plane
  • Migration
  • Migratory Bird Act
  • Milankovitch Cycle
  • Milliequivalent
  • Milliequivalents Per Liter
  • Milliosmole
  • Mineral
  • Mineral Soil
  • Mineralocorticoid
  • Mismatch Repair
  • Mitochondria
  • Mitochondria-first Hypothesis
  • Mitochondrial Disease
  • Mitochondrial Genomics
  • Mitosis
  • Mitosome
  • Mitotic Phase
  • Mitotic Spindle
  • Mitral Valve
  • Mixotroph
  • Mobility
  • Model Organism
  • Model System
  • Modern Synthesis
  • Modified Root
  • Modified Stem
  • Molality
  • Molarity
  • Mold
  • Mole
  • Molecular Biology
  • Molecular Catalyst
  • Molecular Cloning
  • Molecular Comparison
  • Molecular Structure
  • Molecular Systematics
  • Molecule
  • Mollusca
  • Monocarpic
  • Monocot
  • Monocyte
  • Monoecious
  • Monogamy
  • Monogastric
  • Monohybrid
  • Monohybrid Cross
  • Monomer
  • Monosaccharide
  • Monosomy
  • Monotreme
  • Monovary
  • Morning Sickness
  • Mortality Rate
  • Moss
  • Motor End Plate
  • Muc Protein
  • Mucin
  • Mucosa-associated Lymphoid Tissue
  • Mucus
  • Mullerian Mimicry
  • Multihybrid Fertilization
  • Multiple Alleles
  • Multiple Cloning Site
  • Multiple Fruit
  • Muscle Contraction
  • Muscle Fiber Structure
  • Muscle Spindle
  • Muscle Tension
  • Muscle Tissue
  • Muscle Type
  • Muscular System
  • Musculoskeletal System
  • Mutant
  • Mutation
  • Mutual Relationship
  • Mutualism
  • Myc
  • Mycelium
  • Mycetismus
  • Mycologist
  • Mycology
  • Mycorrhiza
  • Mycorrhizae
  • Mycosis
  • Mycotoxicosis
  • Myelin
  • Myocardial Infarction
  • Myocardium
  • Myofibril
  • Myofilament
  • Myopia
  • Myriapoda
  • Myxini
  • NAD
  • NADH
  • NADP
  • NADPH
  • NK
  • Nacre
  • Nasal Cavity
  • Natural Killer Cell
  • Natural Plant Reproduction
  • Natural Sciences
  • Natural Selection
  • Nature Preserve
  • Nauplius
  • Nectar
  • Nectar Guide
  • Negative Feedback Loop
  • Negative Frequency-dependent Selection
  • Negative Gravitropism
  • Negative Polarity
  • Negative Regulation
  • Negative Regulator
  • Nematocyst
  • Nematoda
  • Nematode
  • Nematode Excretory System
  • Nematode Morphology
  • Nematode Nervous System
  • Nematode Reproduction
  • Nemertea
  • Nemertea Digestive System
  • Nemertea Morphology
  • Nemertea Nervous System
  • Nemertea Reproduction
  • Neognathae
  • Neornith
  • Nephridia
  • Nephridiopore
  • Nephrologist
  • Nephrology
  • Nephron
  • Neritic Zone
  • Nerve Impulse Transmission
  • Nervous System
  • Nervous System Disorder
  • Nervous Tissue
  • Net Consumer Productivity
  • Net Primary Productivity
  • Net Production Efficiency
  • Network Model
  • Neural Response
  • Neural Stimuli
  • Neural Thermoregulation
  • Neural Tube
  • Neurobiology
  • Neurodegenerative Disorder
  • Neurogenesis
  • Neurological Disorder
  • Neurologist
  • Neuron
  • Neuron Communication
  • Neuron Parts
  • Neuron Structure
  • Neuron Type
  • Neurotransmitter
  • Neutral PH
  • Neutron
  • Neutrophil
  • Next-generation Sequencing
  • Niels Bohr
  • Nitrification
  • Nitrogen Cycle
  • Nitrogen Fixation
  • Nitrogenase
  • Nitrogenous Waste
  • Noble Gas
  • Nociception
  • Node
  • Nodes of Ranvier
  • Nodule
  • Non-competitive Inhibition
  • Non-electrolyte
  • Non-neutral PH
  • Non-renewable Resource
  • Non-sister Chromatid
  • Non-vascular Plant
  • Nondisjunction
  • Nonparental Type
  • Nonpolar Covalent Bond
  • Nonrandom Mating
  • Nonsense Codon
  • Nontemplate Strand
  • Norepinephrine
  • Northern Blotting
  • Notochord
  • Nuclear Division
  • Nuclear Envelope
  • Nucleic Acid
  • Nucleic Acids
  • Nucleoid
  • Nucleolus
  • Nucleoplasm
  • Nucleosome
  • Nucleotide
  • Nucleotide Excision Repair
  • Nucleus
  • Nucleus-first Hypothesis
  • Nutrient
  • Nutrient Deficiency
  • Nutrition
  • Nutritional Adaptation
  • Nutritional Requirements of Plants
  • O Horizon
  • Obesity
  • Obstructive Disease
  • Occipital Lobe
  • Ocean Upwelling
  • Oceanic Zone
  • Octamer Box
  • Octet Rule
  • Oderant
  • Odor
  • Odorant
  • Oil
  • Okazaki Fragment
  • Olfaction
  • Olfactory Bulb
  • Olfactory Epithelium
  • Oligodendrocyte
  • Oligosaccharin
  • Omega Fat
  • Omega-3
  • Omega-6
  • Omnivore
  • Oncogene
  • Oncogenic Virus
  • Oncolytic Virus
  • One-child Policy
  • Oogenesis
  • Oomycete
  • Open Circulatory System
  • Open System
  • Operant Conditioning
  • Operator
  • Operon
  • Opisthokonta
  • Opposition
  • Opsonization
  • Orbital
  • Order
  • Organ
  • Organ System
  • Organ of Corti
  • Organelle
  • Organic Compound
  • Organic Molecule
  • Organic Soil
  • Organism
  • Organism Diversity
  • Organismal Ecology
  • Organogenesis
  • Origin
  • Origin of Species
  • Ornithorhynchidae
  • Osculum
  • Osmoconformer
  • Osmolality
  • Osmolarity
  • Osmophile
  • Osmoreceptor
  • Osmoregulation
  • Osmoregulator
  • Osmoregulatory
  • Osmosis
  • Osmotic Balance
  • Osmotic Excretion
  • Osmotic Pressure
  • Osmotic Regulation
  • Osmotic System
  • Osseous Tissue
  • Ossicle
  • Ossification
  • Osteichthyes
  • Osteoblast
  • Osteoclast
  • Osteocyte
  • Osteon
  • Osteons
  • Ostia
  • Ostium
  • Ostracoderm
  • Outbreeding
  • Outer Ear
  • Outward Recoil
  • Oval Window
  • Ovarian Cycle
  • Over-harvesting
  • Overpopulation
  • Oviduct
  • Oviger
  • Oviparity
  • Ovoviparity
  • Ovulation
  • Ovule
  • Oxidative Phosphorylation
  • Oxygen
  • Oxygen Dissociation Curve
  • Oxygen-carrying Capacity
  • Oxytocin
  • P1
  • P21
  • P53
  • PAMP
  • PCR
  • PCT
  • PH Paper
  • PH Scale
  • PNS
  • PRL
  • PRR
  • PTH
  • Pacinian Corpuscle
  • Pain
  • Paleobotany
  • Paleognathae
  • Paleontologist
  • Paleontology
  • Paleozoic Period
  • Palmately Compound Leaf
  • Pan
  • Pancreas
  • Pancreatic Islets
  • Pandemic
  • Papilla
  • Parabasalid
  • Paracentric
  • Paracrine Signal
  • Parafollicular Cell
  • Paramecium
  • Paranthropus
  • Parasite
  • Parasitic Plant
  • Parasitism
  • Parasympathetic Nervous System
  • Parathyroid Gland
  • Parathyroid Hormone
  • Parazoa
  • Parenchyma Cell
  • Parent Material
  • Parental Care
  • Parental Generation
  • Parental Type
  • Parietal Lobe
  • Parkinson's Disease
  • Parthenogenesis
  • Partial Pressure
  • Particulate Matter
  • Passive Immunity
  • Passive Transport
  • Patella
  • Pathogen
  • Pathogen Recognition
  • Pathogen-associated Molecular Pattern
  • Pathogens
  • Pathologist
  • Pattern Recognition Receptor
  • Patterns of Biodiversity
  • Patterns of Evolution
  • Peas
  • Peat Moss
  • Pectoral Girdle
  • Pedigree Analysis
  • Pedipalp
  • Peer-reviewed
  • Pelagic Realm
  • Pellicle
  • Penis
  • Peppered Moth
  • Pepsin
  • Pepsinogen
  • Peptide Bond
  • Peptide Hormone
  • Peptidoglycan
  • Peptidyl Transferase
  • Perception
  • Perennial
  • Perforin
  • Perianth
  • Pericardium
  • Pericarp
  • Pericentric
  • Pericycle
  • Periderm
  • Periodic Table
  • Peripheral Nervous System
  • Peripheral Protein
  • Peripheral Resistance
  • Perirenal Fat Capsule
  • Peristalsis
  • Peristome
  • Peritubular Capillary Network
  • Permafrost
  • Permanent Tissue
  • Permissive
  • Peroxisome
  • Petal
  • Petiole
  • Petromyzontidae
  • Phage
  • Phage Therapy
  • Phagocytosis
  • Pharmaceutical Chemist
  • Pharmacogenomics
  • Pharyngeal Slits
  • Pharynx
  • Phenotype
  • Pheromone
  • Phloem
  • Phosphatase
  • Phosphate Group
  • Phosphodiester
  • Phosphodiesterase
  • Phosphofructokinase
  • Phospholipid
  • Phospholipid Bilayer
  • Phosphorus Cycle
  • Phosphorylation
  • Photic Zone
  • Photoautotroph
  • Photomorphogenesis
  • Photon
  • Photoperiodism
  • Photoreceptor
  • Photosynthate Transport
  • Photosynthesis
  • Photosynthesis Products
  • Photosynthesis Reactants
  • Photosystem I
  • Photosystem II
  • Phototroph
  • Phototropin
  • Phototropism
  • Phyla
  • Phyllotaxy
  • Phylogenetic Model
  • Phylogenetic Tree
  • Phylogeny
  • Phylum
  • Phylum Annelida
  • Phylum Arthropoda
  • Phylum Cnidaria
  • Phylum Echinodermata
  • Phylum Mollusca
  • Phylum Nematoda
  • Phylum Nemertea
  • Phylum Porifera
  • Physical Anthropologist
  • Physical Location
  • Physical Map
  • Physical Properties of Soil
  • Physical Science
  • Physiological Dead Space
  • Physiological Shunt
  • Physiology
  • Phytochrome
  • Pia Mater
  • Pigment
  • Pilidium
  • Pinna
  • Pinnately Compound Leaf
  • Pinocytosis
  • Pioneer Species
  • Pistil
  • Pith
  • Pituitary Dwarfism
  • Pituitary Gland
  • Pivot Joint
  • Placenta
  • Plagiarism
  • Plague of Athens
  • Planar Joint
  • Planaria
  • Planktivore
  • Plankton
  • Planospiral
  • Plant Adaptation
  • Plant Anatomy
  • Plant Animal Interaction
  • Plant Biodiversity
  • Plant Biology
  • Plant Body
  • Plant Cell
  • Plant Chemical Composition
  • Plant Death
  • Plant Defense
  • Plant Ecology
  • Plant Evolution
  • Plant Fertilization
  • Plant Form
  • Plant Hormones
  • Plant Life Span
  • Plant Life on Land
  • Plant Lifecycle
  • Plant Lifespan
  • Plant Nutrient
  • Plant Nutrition
  • Plant Organ System
  • Plant Organs
  • Plant Parasite
  • Plant Pathogen
  • Plant Phylogeny
  • Plant Physiology
  • Plant Reproduction
  • Plant Reproductive Development
  • Plant Reproductive Process
  • Plant Reproductive Structure
  • Plant Response
  • Plant Response to Touch
  • Plant Response to Wind
  • Plant Sensory System
  • Plant Sexual Reproduction
  • Plant Transport
  • Plantar Flexion
  • Plants
  • Planuliform
  • Plasma
  • Plasma Cell
  • Plasma Membrane
  • Plasma Membrane Hormone Receptor
  • Plasmid
  • Plasmodesma
  • Plasmodesmata
  • Plasmodium
  • Plasmogamy
  • Plastid
  • Platelet
  • Platyrrhini
  • Pleistocene Extinction
  • Plesiadapis
  • Pleura
  • Pleurisy
  • Ploidy Level
  • Plumule
  • Pneumatic Bone
  • Point Mutation
  • Polar Body
  • Polar Covalent Bond
  • Polar Nuclei
  • Polarity
  • Pollen
  • Pollen Evolution
  • Pollen Grain
  • Pollen Tube
  • Pollination
  • Pollination by Bats
  • Pollination by Birds
  • Pollination by Insects
  • Pollination by Water
  • Pollination by Wind
  • Poly-A Tail
  • Polyandry
  • Polycarpic
  • Polygenic
  • Polygenic Inheritance
  • Polygyny
  • Polymer
  • Polymerase Chain Reaction
  • Polymorphism
  • Polynucleotide
  • Polyp
  • Polypeptide
  • Polyploid
  • Polyploidy
  • Polysaccharide
  • Polysome
  • Polyspermy
  • Polytomy
  • Pond
  • Pongo
  • Population
  • Population Density
  • Population Distribution
  • Population Dynamics
  • Population Ecology
  • Population Evolution
  • Population Genetics
  • Population Model
  • Population Regulation
  • Population Research
  • Population Size
  • Population Variation
  • Population/demography
  • Porifera
  • Positive Feedback Loop
  • Positive Frequency-dependent Selection
  • Positive Gravitropism
  • Positive Polarity
  • Positive Regulator
  • Post-Cambrian
  • Post-anal Tail
  • Post-transcriptional
  • Post-transcriptional Gene Regulation
  • Post-translational
  • Post-translational Gene Regulation
  • Posterior Pituitary
  • Postzygotic Barrier
  • Potential Energy
  • Potocytosis
  • PrP
  • Pre-Cambrian
  • Precapillary Sphincter
  • Predation
  • Predator
  • Pregnancy
  • Preinitiation Complex
  • Presbyopia
  • Present Climate Change
  • Preservation
  • Preserve
  • Preserve Design
  • Prezygotic Barrier
  • Primary Active Transport
  • Primary Bronchus
  • Primary Consumer
  • Primary Electron Acceptor
  • Primary Feather
  • Primary Growth
  • Primary Producer
  • Primary Structure
  • Primary Succession
  • Primase
  • Primate
  • Primate Characteristic
  • Primate Evolution
  • Primer
  • Prion Protein
  • Prions
  • Probability
  • Probability Method
  • Probe
  • Product
  • Product Rule
  • Productive
  • Progesterone
  • Prognathic Jaw
  • Progymnosperm
  • Prokaryote
  • Prokaryote Cell Division
  • Prokaryote Energy
  • Prokaryote Evolution
  • Prokaryote HGT
  • Prokaryote Metabolism
  • Prokaryote Reproduction
  • Prokaryote-first Hypothesis
  • Prokaryotes
  • Prokaryotic Cell
  • Prokaryotic Cell Division
  • Prokaryotic DNA
  • Prokaryotic Diversity
  • Prokaryotic Gene Expression
  • Prokaryotic Gene Regulation
  • Prokaryotic Genome
  • Prokaryotic Metabolism
  • Prokaryotic Transcription
  • Prolactin
  • Prolactin-inhibiting Hormone
  • Prolactin-releasing Hormone
  • Prometaphase
  • Prometaphase I
  • Prometaphase II
  • Promoter
  • Pronation
  • Proofreading
  • Prophage
  • Prophase
  • Prophase I
  • Prophase II
  • Proprioception
  • Propriorception
  • Prosimian
  • Prostate Gland
  • Prosthetic
  • Protease
  • Proteasome
  • Protein
  • Protein Digestion
  • Protein Folding
  • Protein Function
  • Protein Metabolic Pathway
  • Protein Organization
  • Protein Shape
  • Protein Signature
  • Protein Synthesis
  • Protein Type
  • Proteins
  • Proteomics
  • Protist
  • Protist Cell Structure
  • Protist Diversity
  • Protist Ecology
  • Protist Group
  • Protist Habitat
  • Protist Life Cycle
  • Protist Metabolism
  • Protist Motility
  • Protist Supergroup
  • Protista
  • Protists
  • Protists Cell Structure
  • Protists Ecology
  • Protists Life Cycle
  • Protists Motility
  • Proto-oncogene
  • Proton
  • Protonema
  • Protostome
  • Protraction
  • Proventriculus
  • Proximal Convoluted Tubule
  • Pseudo-ruminant
  • Pseudocoelomate
  • Pseudostratified
  • Psychrophile
  • Pterosaur
  • Pulmocutaneous Circulation
  • Pulmonary Circulation
  • Punctuated Equilibrium
  • Punnett Square
  • Pupil
  • Pure Culture
  • Purine
  • Pyramidine
  • Pyruvate
  • Pyruvate Kinase
  • Pyruvate Oxidation
  • Pyruvic Acid
  • Quadrat
  • Quaternary Structure
  • Quiescent
  • Quorum Sensing
  • R-selected Species
  • R.A. Fisher
  • RBP
  • RER
  • RNA
  • RNA Binding Protein
  • RNA Editing
  • RNA Processing
  • RRNA
  • RT-PCR
  • Rachis
  • Radial Cleavage
  • Radial Glia
  • Radial Symmetry
  • Radiation Hybrid Mapping
  • Radicle
  • Radioactive Decay
  • Radioisotope
  • Radiolarian
  • Radioresistant
  • Radius
  • Radula
  • Randomness
  • Raphe
  • Rate of Diffusion
  • Rate of Speciation
  • Rates of Speciation
  • Ray-finned Fish
  • Rb
  • Reactant
  • Reaction Center
  • Reading Frame
  • Recepter-mediated Endocytosis
  • Reception
  • Receptive Field
  • Receptor
  • Receptor Potential
  • Receptor-mediated Endocytosis
  • Recessive
  • Recessive Allele
  • Recessive Gene
  • Recessive Lethal
  • Reciprocal Cross
  • Recombinant DNA
  • Recombinant Protein
  • Recombinant Type
  • Recombination
  • Recombination Frequency
  • Recombination Nodule
  • Reconnection
  • Recruitment
  • Rectum
  • Recycler
  • Red Algae
  • Red Blood Cell
  • Red Light
  • Red Queen Hypothesis
  • Red/far-red Response
  • Redox Reaction
  • Reduction
  • Reduction Division
  • Reflex Action
  • Refractory Period
  • Regeneration
  • Regulation
  • Regulation of Gene Expression
  • Regulatory Protein
  • Regulatory T Cell
  • Relative Fitness
  • Relative Species Abundance
  • Renal
  • Renal Artery
  • Renal Capsule
  • Renal Column
  • Renal Corpuscle
  • Renal Fascia
  • Renal Pelvis
  • Renal Pyramid
  • Renal Tubule
  • Renal Vein
  • Renin
  • Renin-angiotensin
  • Renin-angiotensin-aldosterone
  • Replication Fork
  • Replicative Intermediates
  • Repressor
  • Reproduction
  • Reproductive Anatomy
  • Reproductive Barrier
  • Reproductive Cloning
  • Reproductive Endocrinologist
  • Reproductive Hormones
  • Reproductive Isolation
  • Reproductive System Regulation
  • Reptile
  • Reptile Characteristics
  • Residence Time
  • Residual Volume
  • Resistance
  • Resorption
  • Respiratory Bronchiole
  • Respiratory Distress Syndrome
  • Respiratory Quotient
  • Respiratory Rate
  • Respiratory System
  • Respiratory Therapist
  • Resting Membrane Potential
  • Restriction Endonuclease
  • Restriction Fragment Length Polymorphism
  • Restrictive Disease
  • Results
  • Resuscitation
  • Retina
  • Retinal Processing
  • Retinoblastoma Protein
  • Retraction
  • Reverse Genetics
  • Reverse Transcriptase
  • Reverse Transcriptase PCR
  • Reversible Chemical Reaction
  • Review Article
  • Rheumatologist
  • Rhizaria
  • Rhizobia
  • Rhizoid
  • Rhizome
  • Rhizosphere
  • Rho-dependent Termination
  • Rho-independent Termination
  • Rhodophyte
  • Rhodopsin
  • Rhynchocoel
  • Rib
  • Ribcage
  • Ribonuclease
  • Ribonucleic Acid
  • Ribosomal RNA
  • Ribosome
  • Ring Model
  • Ring of Life
  • River
  • Robert Boyle
  • Robert Hooke
  • Rod
  • Root
  • Root Anatomy
  • Root Bacteria Interaction
  • Root Cap
  • Root Growth
  • Root Hair
  • Root Modification
  • Root Pressure
  • Root Structure
  • Root System
  • Root Zone
  • Rooted
  • Roots
  • Rotational Movement
  • Rough Endoplasmic Reticulum
  • Roughage
  • RuBP
  • RuBisCO
  • Ruffini Ending
  • Ruminant
  • Runner
  • S Phase
  • S-layer
  • S-shaped Growth Curve
  • S. J. Singer
  • SER
  • SMR
  • Sac Fungi
  • Saddle Joint
  • Sagittal Plane
  • Salamander
  • Salivary Amylase
  • Saltatory Conduction
  • Salty
  • Sand
  • Sanger Method
  • Saprobe
  • Saprophytes
  • Sarcolemma
  • Sarcomere
  • Sarcopterygii
  • Sargassum
  • Satellite Glia
  • Saturated Fat
  • Saturated Fatty Acid
  • Sauropsid
  • Scapula
  • Scarification
  • Schizocoelous Coelom
  • Schizocoely
  • Schizophrenia
  • Schwann Cell
  • Science
  • Scientific Method
  • Scientific Reasoning
  • Sclerenchyma Cell
  • Sclerocyte
  • Scrotum
  • Scutellum
  • Scyphozoa
  • Sebaceous Gland
  • Second Filial Generation
  • Second Gap
  • Second Law of Thermodynamics
  • Second Messenger
  • Secondary Active Transport
  • Secondary Consumer
  • Secondary Endocrine Function
  • Secondary Endosymbiosis
  • Secondary Feather
  • Secondary Growth
  • Secondary Plant Compounds
  • Secondary Sexual Characteristic
  • Secondary Structure
  • Secondary Succession
  • Secretin
  • Seed
  • Seed Development
  • Seed Dispersal
  • Seed Evolution
  • Seed Germination
  • Seed Plant
  • Seed Plant Evolution
  • Seed Plant Reproduction
  • Seed Plants
  • Seedless Non-vascular Plant
  • Seedless Non-vascular Plants
  • Seedless Plant
  • Seedless Plants
  • Seedless Tracheophyte
  • Seedless Vascular Plant
  • Segmental Artery
  • Segregation of Alleles
  • Selective Permeability
  • Selective Pressure
  • Selectively Permeable
  • Self-pollination
  • Semelparity
  • Semen
  • Semi-permeable Membrane
  • Semicircular Canal
  • Semilunar Valve
  • Seminal Vesicle
  • Seminiferous Tubule
  • Senescence
  • Sense
  • Sensory Perception
  • Sensory Process
  • Sensory Receptor
  • Sensory System
  • Sensory Transduction
  • Sensory-somatic Nervous System
  • Sepal
  • Septum
  • Sequence Mapping
  • Serendipity
  • Sertoli Cell
  • Serum
  • Sessile
  • Set Point
  • Seta
  • Seta/chaeta
  • Sex Chromosome
  • Sex Chromosomes
  • Sex Determination
  • Sex Linkage
  • Sex-linked Disorder
  • Sex-linked Genes
  • Sex-linked Trait
  • Sex-role Reversed
  • Sexual Development
  • Sexual Dimorphism
  • Sexual Dimorphisms
  • Sexual Lifecycle
  • Sexual Reproduction
  • Sexual Response
  • Sexual Selection
  • Shared Ancestral Character
  • Shared Characteristic
  • Shared Derived Character
  • Shinbone
  • Shine-Dalgarno Sequence
  • Shoot System
  • Short Bone
  • Short-term Stress Response
  • Shotgun Sequencing
  • Sickle-cell Anemia
  • Sieve-tube Cell
  • Sight
  • Signal
  • Signal Cascade
  • Signal Integration
  • Signal Propagation
  • Signal Response
  • Signal Sequence
  • Signal Summation
  • Signal Transduction
  • Signal Transduction Pathway
  • Signal Transmission
  • Signaling Cell
  • Signaling Molecule
  • Signaling Pathway
  • Silent Mutation
  • Silt
  • Simple Epithelia
  • Simple Fruit
  • Simple Leaf
  • Simple Plant Tissue
  • Simulation Model
  • Single Nuclear Division
  • Single Nucleotide Polymorphism
  • Single-cell Organism
  • Single-celled Yeast
  • Single-strand Binding Protein
  • Sink
  • Sinoatrial (SA) Node
  • Sister Chromatid
  • Sister Taxa
  • Skeletal Movement
  • Skeletal Muscle
  • Skeletal Muscle Tissue
  • Skeletal System
  • Skeleton Evolution
  • Skin Sensor
  • Skull
  • Sliding Clamp
  • Sliding Filament Model of Contraction
  • Slime Mold
  • Small 40S Ribosomal Subunit
  • Small Intestine
  • Small Nuclear RNA
  • Smell
  • Smooth Endoplasmic Reticulum
  • Smooth Muscle
  • Smooth Muscle Tissue
  • Sociobiology
  • Sodium-potassium Pump
  • Soil
  • Soil Biology
  • Soil Climate
  • Soil Composition
  • Soil Formation
  • Soil Horizon
  • Soil Profile
  • Soil Properties
  • Solar Dependence
  • Solar Intensity
  • Solid
  • Solubility
  • Solute
  • Solute Transport
  • Solvent
  • Solvent Density
  • Somatic Cell
  • Somatosensation
  • Somatosensory Receptor
  • Somatostatin
  • Somite
  • Soredia
  • Sound
  • Sound Reception
  • Sound Transduction
  • Sour
  • Source
  • Source Water
  • Southern Blotting
  • Speciation
  • Species
  • Species Distribution
  • Species Distribution Pattern
  • Species Diversity
  • Species Richness
  • Species-area Relationship
  • Specific Heat Capacity
  • Spermatheca
  • Spermatogenesis
  • Spermatophyte
  • Sphenodontia
  • Sphere of Hydration
  • Sphincters
  • Spice
  • Spinal Cord
  • Spinal Nerve
  • Spindle Checkpoint
  • Spine
  • Spiral Cleavage
  • Spirometry
  • Splicing
  • Sponge
  • Sponge Locomotion
  • Sponge Metabolism
  • Sponge Morphology
  • Sponge Reproduction
  • Spongocoel
  • Spongy Bone Tissue
  • Spontaneous Mutation
  • Spontaneous Reaction
  • Sporangia
  • Sporangium
  • Spore
  • Sporocyte
  • Sporophyll
  • Sporophyte
  • Sporopollenin
  • Spring Turnover
  • Squamata
  • Squamous Epithelia
  • Stabilizing Selection
  • Stahl
  • Stamen
  • Standard Metabolic Rate
  • Stapes
  • Start Codon
  • Statolith
  • Stele
  • Stem
  • Stem Anatomy
  • Stem Growth
  • Stem Modifications
  • Stentor
  • Stereocilia
  • Stereoscopic Vision
  • Sternum
  • Steroid
  • Stigma
  • Stipule
  • Stirrup
  • Stolon
  • Stomach
  • Stomata
  • Stomatal Regulation
  • Stramenopile
  • Stratified Epithelia
  • Stream
  • Streptophyte
  • Strigolactone
  • Strobili
  • Strobilus
  • Stroke
  • Stroma
  • Stromatolite
  • Structural Isomers
  • Study of Life
  • Style
  • Subduction
  • Subshell
  • Substituted Hydrocarbon
  • Substrate
  • Substrate Phosphorylation
  • Substrate Specificity
  • Subtropical Desert
  • Succinyl CoA
  • Sucrase
  • Sugar Metabolism
  • Sulci
  • Sulcus
  • Sulfur Cycle
  • Sum Rule
  • Summation
  • Superbug
  • Superior Colliculus
  • Superior Vena Cava
  • Superphylum Lophotrochozoa
  • Supination
  • Suprachiasmatic Nucleus
  • Surface Tension
  • Surfactant
  • Survivorship Curve
  • Suspensor
  • Sutton's Theory of Inheritance
  • Suture
  • Sweet
  • Swim Bladder
  • Symbiont
  • Symbiosis
  • Symbiotic Relationship
  • Sympathetic Nervous System
  • Sympatric Speciation
  • Symphyses
  • Symporter
  • Synapse
  • Synapsid
  • Synapsis
  • Synaptic Cleft
  • Synaptic Plasticity
  • Synaptic Signal
  • Synaptic Transmission
  • Synaptic Vesicle
  • Synaptonemal Complex
  • Synarthrosis
  • Synchondrosis
  • Syndesmoses
  • Synergid
  • Synovial Joint
  • Synthesis of Biological Macromolecules
  • Systematics
  • Systemic Circulation
  • Systems Biology
  • Systole
  • T-cell
  • TATA Box
  • TCA Cycle
  • TFIIB
  • TFIID
  • TFIIE
  • TFIIF
  • TFIIH
  • TRNA
  • Tachyglossidae
  • Tactile Corpuscle
  • Tadpole
  • Tap Root
  • Target Cell
  • Tarsal
  • Tastant
  • Taste
  • Taste Bud
  • Taxa
  • Taxis
  • Taxon
  • Taxonomy
  • Tectorial Membrane
  • Tegmen
  • Teichoic Acid
  • Telomerase
  • Telomere
  • Telomere Replication
  • Telophase
  • Telophase I
  • Temperate Forest
  • Temperate Grassland
  • Temperature
  • Temperature-dependent Sex Determination (TSD)
  • Template Strand
  • Temporal Fenestrae
  • Temporal Isolation
  • Temporal Lobe
  • Tendril
  • Terminal Bronchiole
  • Terrestrial Biome
  • Terrestrial Ecosystem
  • Terrestrial Environment
  • Terrestrial Influence
  • Tertiary Consumer
  • Tertiary Structure
  • Test Cross
  • Testa
  • Testis
  • Testosterone
  • Testudines
  • Tetrahedral Geometry
  • Tetrahedron
  • Tetrapod
  • Thalamus
  • Thalassemia
  • Thallus
  • The Periodic Table
  • Theodor Schwann
  • Theory
  • Therapod
  • Thermocline
  • Thermodynamics
  • Thermophile
  • Thermoreception
  • Thermoregulation
  • Thichromatic Coding
  • Thick Filament
  • Thighbone
  • Thigmomorphogenesis
  • Thigmonastic
  • Thigmotropism
  • Thin Filament
  • Thomas Hunt Morgan
  • Thoracic Cage
  • Thoracic Cavity
  • Thorn
  • Threats to Biodiversity
  • Three-point Test Cross
  • Threshold of Excitation
  • Thrichomatic Coding
  • Thryoxine
  • Thylakoid
  • Thymus
  • Thyroglobulin
  • Thyroid
  • Thyroid Gland
  • Thyroid Regulation
  • Thyroid-stimulating Hormone
  • Thyroxine
  • Ti Plasmid
  • Tibia
  • Tidal Volume
  • Tight Junction
  • Tissue
  • Tissue Structure
  • Tonic Activity
  • Tonicity
  • Topography
  • Topoisomerase
  • Torpor
  • Total Lung Capacity
  • Toxicogenomics
  • Trabecula
  • Trachea
  • Tracheal System
  • Tracheid
  • Tracheophyte
  • Tragedy of the Commons
  • Trait
  • Trait-blending Hypothesis
  • Trans Fat
  • Trans-acting Element
  • Transcription
  • Transcription Bubble
  • Transcription Factor
  • Transcription Factor Binding Site
  • Transcription Gene Regulation
  • Transcriptional Gene Regulation
  • Transcriptional Start Site
  • Transduction
  • Transfer Cell
  • Transfer RNA
  • Transformation
  • Transgenic
  • Transition State
  • Transition Substitution
  • Transitional Epithelia
  • Translation
  • Translational Gene Regulation
  • Translocation
  • Transpiration
  • Transpiration Regulation
  • Transport Maximum
  • Transport Protein
  • Transverse Plane
  • Transversion Substitution
  • Tree of Life
  • Triacylglycerol
  • Trichome
  • Tricuspid Valve
  • Triglyceride
  • Triiodothyronine
  • Trimester
  • Triplobast
  • Trisomy
  • Trocophore
  • Trophic Diversity
  • Trophic Level
  • Trophic Level Energy
  • Trophic Level Transfer Efficiency
  • Trophoblast
  • Tropical Wet Forest
  • Tropomyosin
  • Troponin
  • Trp Operon
  • Trypanosome
  • Trypsin
  • Tryptophan
  • Tuber
  • Tubular Reabsorption
  • Tubular Secretion
  • Tumor Suppressor
  • Tumor Suppressor Gene
  • Tunicate
  • Turgor Pressure
  • Tympanic Membrane
  • Tympanum
  • Types of Ecosystems
  • Ubiquinone
  • Ulna
  • Ultrasound
  • Umami
  • Unculturable Prokaryote
  • Unfavorable Allele
  • Unicellular
  • Unidirectional Circulation
  • Unified Cell Theory
  • Uniporter
  • Uniramous Appendage
  • Unit Factor
  • Unsaturated Fat
  • Unsaturated Fatty Acid
  • Untranslated Region
  • Up-regulation
  • Upstream
  • Urea Cycle
  • Ureotelic
  • Ureter
  • Uric Acid
  • Urinary Bladder
  • Urine
  • Urine Formation
  • Urochordata
  • Urodela
  • Uroepithelial
  • Uterus
  • VBNC State
  • Vaccination
  • Vaccine
  • Vacuole
  • Vagina
  • Valence Shell
  • Van Der Waals Interaction
  • Variable
  • Variable Number of Tandem Repeats
  • Variation
  • Vasa Recta
  • Vascular Bundle
  • Vascular Plant
  • Vascular Tissue
  • Vasoconstriction
  • Vasodilation
  • Vasodilator
  • Vasopressin
  • Vein
  • Veliger
  • Vena Cava
  • Venation
  • Venous P_(CO_2 )
  • Venous P_(O_2 )
  • Ventilation/perfusion
  • Ventral Cavity
  • Ventricaria Ventricosa
  • Ventricle
  • Venule
  • Vernalization
  • Vertebral Column
  • Vertebrata
  • Vertebrate
  • Vertebrate Evolution
  • Vertebrate Formation
  • Vertebrates
  • Vertical Transmission
  • Vesicle
  • Vessel Element
  • Vestibular Information
  • Vestibular Sensation
  • Vestibular Sense
  • Vestigial Structure
  • Veterinarian
  • Viable-but-non-culturable State
  • Vicariance
  • Villi
  • Viral Assembly
  • Viral Capsids
  • Viral Morphology
  • Viral Receptors
  • Viral Replication
  • Virion
  • Viroids
  • Virologist
  • Virology
  • Virus
  • Virus Attachment
  • Virus Core
  • Virus Detection
  • Virus Discovery
  • Virus Entry
  • Virus Evolution
  • Virus Infection
  • Visceral Pleura
  • Visible Light
  • Vision
  • Vital Capacity
  • Vitamin
  • Viviparity
  • W. Ford Doolittle
  • WNS
  • Walter Sutton
  • Waste Excretion
  • Water
  • Water Cycle
  • Water Mold
  • Water Pollination
  • Water Potential
  • Water Transport
  • Wavelength
  • Wax
  • Weather
  • Web Model
  • Web of Life
  • Wetland
  • Whisk Fern
  • White Blood Cell
  • White-nose Syndrome
  • Whole Genome Sequencing
  • Whorled
  • Wild Food Sources
  • Wild Type
  • Wildlife Preserve
  • Wilkins and Holliday
  • Wind Pollination
  • Wood Products
  • X Inactivation
  • X Linkage
  • X-linked Disorders
  • X-linked Genes
  • X-linked Trait
  • Xylem
  • Yeast
  • Zero Population Growth
  • Zoea
  • Zona Pellucida
  • Zoo
  • Zoology
  • Zoonosis
  • Zygomycete
  • Zygomycota
  • Zygospore
  • Zygote
    License:
    Creative Commons Attribution
    Language:
    English

    Education Standards

    OpenStax Biology 2e

    Unit 3
    The Cell
    Unit 4
    Genetics
    Unit 6
    Biological Diversity
    Unit 7
    Plant Structure and Function
    Unit 8
    Animal Structure and Function
    Unit 9
    Ecology