19) Considering that mature sporophytes of true moses get their nutrition from t

Question

19) Considering that mature sporophytes of true moses get their nutrition from the gametophytes on which they grow, and considering these generations as individual plants, what is true of the relationship between true moss sporophytes and gametophytes?

A) sporophytes are endosymbionts of gametophytes

B) sprophytes are pedators of gametophytes.

C) sporophytes are commensalists of gametophytes

D) sprophytes are parasites of gametophytes

20. As is true of the gametophytes of all land pants, the gametophytes of true mosses lack stomata. Yet, the feather moss Pleurozium harbors nitrogen-fixing cyanobacteria. Which of the following is a feature of moss gametophytes that is most important for the continued surbibal of these cyanobacteria in the tissues of the feather moss gametophytes?

A) lack of cuticle

b) lack of vascular tissues

c) lack of true leaves or roots

D) lack of an independent sprophyte

e) lack of multiple cell layers in “leaves” of “buds”

21) A botanist discovers a new species of plant in tropical rain forest. After observing its anatomy and life cycle, he motes the following characeristcs: flagellated sperm, xylem with tracheids, separate gametophyte and sporophyte geneartions with the sprophyte dominant, and no seed. “ This is probably most closely related to

A) mosses,

B) charophytes

c) ferns

d) gymnosperms

E) flowering plants

22) A botainist discovers a new species of land plant with a dominant sporophyte, chlorophylls a and b, and cell wall made of cellulose. In assigning this plant to a phylum, which of the following if present, would be least useful?

A) endosperm

B) seeds

C) sperm that lack flagella

D) flowers

E) spores

24) Arrange the following structrues from largest to smallest, assuming that they belong to two generation of the same angiosperm

1. ovary

2. ovule

3. egg

4. carpel

5. embryo sac

A) 4, 2, 1, 5, 3

B) 4, 5, 2, 1, 3

C) 5, 4, 3, 1, 2

D) 5, 1, 4, 2, 3,

E) 4, 1, 2, 5, 3,

Explanation / Answer

Solutions:

19) Option D- sporophytes are parasites of gametophytes

20) Option D- Lack of multiple layers in leaves of buds

21) Option C- ferns

22) Option E- spores

24)Option E- 4,1,2,5,3

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