A Fruit Is Most Commonly

Question: 1.) The sporophytes of mosses depend on the gametophytes for water and nutrition. In seed plants, the reverse is true. From which seed plant sporophyte structure(s) do the immature (unfertilized) gametophytes directly gain water and nutrition?

a.) Sporophylls

b.) Embryos

c.) Sporangia

d.) Sporopollenin

e.) Ovary

Answer: c.) Sporangia

Question:

Answer: a.) The flower is composed of gametophyte tissue only.

Question:

Answer: b.) Reduction of the gametophyte phase of the life cycle

Question: 4.) All of the following cellular structures are functionally important in cells of the gametophytes of both

angiosperms and gymnosperms, except

a.) Haploid nuclei.

b.) Mitochondria.

c.) Cell walls.

d.) Chloroplasts.

e.) Peroxisomes.

Answer: b.) Mitochondria.

Question:

Answer: 5) their gametophytes are protected by, and obtain nutrition from, the sporophytes.

Question: 6.) Seeds commonly provide for each of the following except

a.) A choice of germination location.

b.) Dispersal.

c.) Dormancy.

d.) A nutrient supply for the embryo.

e.) Desiccation resistance.

Answer: a.) A choice of germination location.

Question: 7.) In addition to seeds, which of the following characteristics are unique to the seed-producing plants?

a.) A haploid gametophyte retained within tissues of the diploid sporophyte

b.) Lignin present in cell walls

c.) Pollen

d.) A and C only

e.) A, B, and C

Answer: a.) A haploid gametophyte retained within tissues of the diploid sporophyte

Question: 8.) Which of the following most closely represents the male gametophyte of seed-bearing plants?

a.) Ovule

b.) Microspore mother cell

c.) Pollen grain

d.) Embryo sac

e.) Fertilized egg

Answer: c.) Pollen Grain

Question:

Answer: c.) 3, 1, 4, 2

Question: 10.) In flowering plants the integuments of the ovule develop into a(n)

a.) Fruit

b.) Cotyledon

c.) Sporophyte

d.) Seed Coat

e.) Endosperm

Answer: b.) Cotyledon