postprac3 Flashcards
The life-cycle of a typical moss includes
Select one:
a. green, leafy, diploid gametophyte plants and the formation of wind-borne spores.
b. green, leafy, haploid gametophyte plants and the formation of sperm that require free water to swim to the egg.
c. green, leafy, independent diploid sporophyte plants on which spores are formed by meiosis.
d. largely non-photosynthetic sporophyte plants on which spores are formed by mitosis.
b. green, leafy, haploid gametophyte plants and the formation of sperm that require free water to swim to the egg
The photosynthetic, haploid gametophytes are the dominant life-cycle stage and sperm produced in the antheridia require external water to swim to an archegonium containing an egg.
In mosses, the spores
Select one:
a. are produced by the gametophyte.
b. are diploid.
c. germinate and grow into the sporophyte.
d. are released by the capsule.
are released by the capsule
In mosses the physically dominant part of the life cycle is the
Select one:
a. gametophyte generation
b. sporophyte generation
c. the swimming spore stage
d. the frond and spore system
a. gametophyte generation
Ferns can be found in which of the following environments?
Select one:
a. Marine only
b. Terrestrial, fresh-water and marine
c. Terrestrial and fresh-water
d. Terrestrial only
Terrestrial and fresh-water
Which of the following is NOT a similarity between ferns and mosses?
Select one:
a. Gametes are produced by gametangia on the haploid plant body by mitosis
b. Multicellular haploid and diploid plant bodies, alternating in the life cycle
c. Spores are produced from cells in the diploid plant body (sporophyte) by meiosis
d. An organised system of vasculature tissue in the sporophyte
d. An organised system of vasculature tissue in the sporophyte
Why do ferns and mosses typically live in moist conditions?
Select one:
a. Fertilisation depends on the sperm swimming to the egg, and this will only happen if the environment is moist enough for this to occur.
b. Without a moist environment both of these plants would dry out as neither can tolerate complete desiccation
c. The dispersal of spores relies on the presence of moisture
d. Most ferns and mosses prefer a marine environment for gamete transfer.
Fertilisation depends on the sperm swimming to the egg, and this will only happen if the environment is moist enough for this to occur.
Angiosperms and gymnosperms are characterised by
Select one:
a. the absence of spores from their life cycles and the formation of seeds. .
b. the formation of seeds and male and female spores in their life cycles.
c. the dominance of the sporophyte and the absence of gametophyte stages in their life cycles.
d. the absence of spores from their life cycles and the formation of separate male and female gametophytes.
the formation of seeds and male and female spores in their life cycles.
Which statement is correct with regards to the haploid plant body of a seed plant?
Select one:
a. It forms gametes by mitosis
b. It forms gametes by meiosis
c. It is photosynthetic
d. It is nutritionally independent
a. It forms gametes by mitosis
Which structure of a gymnosperm is the female gametophyte?
Select one:
a. Cone
b. Seed
c. Ovule
d. Tree
c. Ovule
Gymnosperms are what kind of basic plant type?
Select one:
a. Grasses
b. Flowering
c. Cone-forming
d. Non-vascular
c. Cone-forming
Angiosperms are what kind of basic plant type?
Select one:
a. Cone-forming
b. Non-vascular
c. Grasses
d. Flowering
d. Flowering
The Angiosperms have an advantage over Gymnosperms and so are now more abundant and diverse worldwide because of their
Select one:
a. formation of pollen and seeds.
b. formation of flowers and fruits.
c. formation of a cuticle and vascular tissue.
d. formation of wind-borne pollen and wind-borne seeds.
b. formation of flowers and fruits
