Gymnosperms

Review Questions

Which of the following traits characterizes gymnosperms?

  1. The plants carry exposed seeds on modified leaves.
  2. Reproductive structures are located in a flower.
  3. After fertilization, the ovary thickens and forms a fruit.
  4. The gametophyte is the longest phase of the life cycle.

Hint:

A

Megasporocytes will eventually produce which of the following?

  1. pollen grain
  2. sporophytes
  3. male gametophytes
  4. female gametophytes

Hint:

D

What is the ploidy of the following structures: gametophyte, seed, spore, sporophyte?

  1. 1n, 1n, 2n, 2n
  2. 1n, 2n, 1n, 2n
  3. 2n, 1n, 2n, 1n
  4. 2n, 2n, 1n, 1n

Hint:

B

In the northern forests of Siberia, a tall tree is most likely a:

  1. conifer
  2. cycad
  3. Ginkgo biloba
  4. gnetophyte

Hint:

A