Which of the following traits characterizes gymnosperms?
- The plants carry exposed seeds on modified leaves.
- Reproductive structures are located in a flower.
- After fertilization, the ovary thickens and forms a fruit.
- The gametophyte is the longest phase of the life cycle.
Megasporocytes will eventually produce which of the following?
- pollen grain
- male gametophytes
- female gametophytes
What is the ploidy of the following structures: gametophyte, seed, spore, sporophyte?
- 1n, 1n, 2n, 2n
- 1n, 2n, 1n, 2n
- 2n, 1n, 2n, 1n
- 2n, 2n, 1n, 1n
In the northern forests of Siberia, a tall tree is most likely a:
- Ginkgo biloba