Solved >   21) The embryo sac of an angiosperm:1389837 …


21) The embryo sac of an angiosperm flower is best represented by which number in the figure above?

A) 1

B) 3

C) 7

D) 11


22) In angiosperms, which number in the figure above represents a component contributing to the formation of endosperm?

A) 1

B) 7

C) 9

D) 11

23) Stomata _____.

A) occur in all land plants and define them as a monophyletic group

B) open to allow gas exchange and close to decrease water loss

C) occur in all land plants and are the same as pores

D) open to increase both water absorption and gas exchange


24) Liverworts, hornworts, and mosses are grouped together as the Bryophytes. Besides not having vascular tissue, what do they all have in common?

A) They are all wind pollinated.

B) They are heterosporous.

C) They can reproduce asexually by producing gemmae.

D) They require water for reproduction.


25) Most moss gametophytes do not have a cuticle and are 1-2 cells thick. What does this imply about moss gametophytes and their structure?

A) They use stomata for gas exchange regulation.

B) They can easily lose water to, and absorb water from, the atmosphere.

C) Photosynthesis occurs throughout the entire gametophyte surface.

D) They have branching veins in their leaves.


26) As you stroll through a moist forest, you are most likely to see a _____.

A) zygote of a green alga

B) gametophyte of a moss

C) sporophyte of a liverwort

D) gametophyte of a fern


27) Which of these are spore-producing structures?

A) sporophyte (capsule) of a moss

B) antheridium of a moss or fern

C) archegonium of a moss or fern

D) gametophyte of a moss

28) What is true about the genus Sphagnum?

A) It is an economically important liverwort.

B) It grows in extensive mats in grassland areas.

C) It accumulates to form coal and is burned as a fuel.

D) It is an important carbon sink, reducing atmospheric carbon dioxide.


29) How are the bryophytes and seedless vascular plants alike?

A) Plants in both groups have vascular tissue.

B) In both groups, sperm swim from antheridia to archegonia.

C) The dominant generation in both groups is the sporophyte.

D) Plants in both groups have true roots, stems, and leaves.


30) In general, liverworts have a cuticle and pores. However, some species do not have pores. What would you predict concerning the cuticle of these species and why?

A) The cuticle would be the same as in those species with pores.

B) The cuticle would be thicker than in those species with pores.

C) The cuticle would be thinner than in those species with pores.
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