Chapter 18: Gymnosperms


Phylum Coniferophyta; p. 439; moderate; ans: a



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Chapter 18-final
Chapter 17-final
25. Phylum Coniferophyta; p. 439; moderate; ans: a

In pines, the immature male gametophyte consists of:


a. two prothallial cells, one generative cell, and one tube cell.

b. one prothallial cell, two generative cells, and one tube cell.

c. one prothallial cell, one generative cell, and two tube cells.

d. two prothallial cells, two generative cells, and one tube cell.

e. one prothallial cell, one generative cell, and one tube cell.


26. Phylum Coniferophyta; p. 439; moderate; ans: e

The seed-scale complex of an ovulate cone consists of:


a. a megasporophyll and two ovules.

b. a megasporophyll and one bract.

c. an ovuliferous scale and two ovules.

d. two ovules and two bracts.

e. an ovuliferous scale, two ovules, and one bract.
27. Phylum Coniferophyta; p. 440; easy; ans: c

In pines, a megaspore mother cell divides to give rise to four ______, of which ______ disintegrate(s).


a. megaspores; one

b. megaspores; two

c. megaspores; three

d. megasporocytes; two

e. megasporocytes; three


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