4) The haploid gametophytes of bryophytes are ________. A) multicellular, just l

Question

4) The haploid gametophytes of bryophytes are ________.

A) multicellular, just like the haploid stages of animal species

B) multicellular and produce zygotes

C) usually composed of single cells, just like the gametes of mammals

D) usually multicellular, but one cell thick

5) If bryophytes do not have vascular tissue, how can some mosses reach 60 centimeters tall?

A) The term nonvascular plant is actually a misnomer.

B) These tall mosses are more closely related to seed plants than to other mosses.

C) Some mosses independently evolved conducting tissues.

D) The rhizoids contain the conducting tissues.

6) If you were asked to design a bryophyte that could be successful in a bare, moist area, which of the following possible adaptations would you include?

A) a symbiosis with phosphorus-absorbing mycorrhizae fungi

B) a symbiosis with nitrogen-fixing cyanobacteria

C) a symbiosis with iron-absorbing algae

D) a symbiosis with toxin-producing dinoflagellates

7) Moss sporophytes are typically green when young, but turn brown when ready to release their spores. This observation would lead you to think that the ________.

A) sporophyte photosynthesizes when young and contributes energy for spore production

B) sporophyte photosynthesizes at all ages—it just uses different wavelengths for photosynthesis at different ages

C) gametophyte cannot photosynthesize

D) cuticle rubs off of older sporophytes and exposes the color that is underneath

8) Assuming equal spore production rates, what is the likely consequence in a bryophyte with both asexual and sexual reproduction versus one with only sexual reproduction?

A) Species with both types of reproduction have higher rates of genetic diversity than species with only sexual reproduction.

B) Species with both types of reproduction have higher population growth rates than species with only sexual reproduction.

C) Species with both types of reproduction are less evolutionarily advanced than species with only sexual reproduction.

D) Species with both types of reproduction occur primarily in dry environments.

25) Compared to nonvascular plants, the ancient relatives of vascular plants ________.

A) produced sporophyte generations independent of, not dependent on, gametophyte generations

B) produced much smaller sporophyte generations

C) produced sporophyte generations that provided more nutrition to gametophyte generations

D) probably experienced less competition for light

26) If you walk through an area with mosses and ferns, you are seeing ________.

A) both sporophyte and gametophyte generations

B) only vascular plants

C) both nonvascular and seed-bearing plants

D) both seedless and seed-bearing plants

Explanation / Answer

4.Gametophyte of bryophytes is multicellular like haploid stages of animals and produce haploid spores. Hence option A is right.

5. Some mosses have independently evolved conduting tissue but different from xylem and phloem. Hence option C is correct.

6. Bryophytes may occur in symbiotic relationship with phosphorus absorbing mycorhizzae on bare rock. Hence option A is correct.

7. Correct answer is D. Cuticle rubs off for spore dispresal.

8. Correct answer is option C. Because in sexual reproduction variation are common which contribute to evolution.

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