Chapter 18: Gymnosperms


Evolution of the Seed; p. 431; easy; ans: d



Download 11.25 Kb.
Page2/17
Date14.01.2022
Size11.25 Kb.
#86610
1   2   3   4   5   6   7   8   9   ...   17
Chapter 18-final
Chapter 17-final
4. Evolution of the Seed; p. 431; easy; ans: d

A micropyle is a(n):


a. nutritive structure of the embryo.

b. nutritive structure of the pollen grain.

c. opening in the megaspore wall.

d. opening in an integument.

e. opening in the megasporangium wall.
5. Evolution of the Seed; p. 431; moderate; ans: e

With the evolution of the ovule, the unit of dispersal shifted from the megaspore to the:


a. sperm.

b. egg.


c. microspore.

d. megaspore mother cell.

e. seed.

6. Evolution of the Seed; p. 431; moderate; ans: e

The fossil record indicates that the integument evolved through a gradual:


a. thickening of the megasporangium wall.

b. splitting of the megaspore wall.

c. fusion of megaspore lobes.

d. splitting of the ovule wall.

e. fusion of integumentary lobes.
7. Evolution of the Seed; p. 431; moderate; ans: c

Just before fertilization, a gymnosperm ovule contains:


a. an embryo.

b. antheridia.

c. archegonia.

d. megaspores.

e. a seed coat.


Download 11.25 Kb.

Share with your friends:
1   2   3   4   5   6   7   8   9   ...   17




The database is protected by copyright ©sckool.org 2022
send message

    Main page