Mastering Biology

24 July 2022
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question
Which statement is true for all sexually reproducing plants and animals?
answer
The process of meiosis produces haploid cells
question
Life cycle of a Moss
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1) Mature Sporophytes produce haploid spores, dispersed by wind 2) Separate spores develop into femal and male gametophytes 3) Haploid eggs from in archegonia, and haploid sperm form in antheridia 4) Haploid gametes undrgo fertilization, forming a diploid zygote 5) The diploid xygote develops into a sporophyte
question
In mosses gametes are produced by _____; in ferns gametes are produced by
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In both, gametes are produced by haploid gametophytes.
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Where do fern antheridia develop?
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on the underside of the gametophyte
question
Which of the following is NOT functionally important in cells of the gametophytes of both angiosperms and gymnosperms?
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Chloroplasts
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Gymnosperms (literally "naked seeds") are
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vascular plants that produce seeds that are not enclosed in an ovary. Like other land plants, gymnosperms have a life cycle called alternation of generations. The four main groups of gymnosperms are cycads, ginkgos, gnetophytes, and conifers. Cycads have palmlike leaves. Ginkgos, represented by one surviving species, have deciduous, fanlike leaves. Gnetophytes include a variety of plants in three genera. Conifers, including redwoods, pines, and cypresses, have needle-like or scaly leaves and produce seeds in cones.
question
Ovules are located?
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Housed within ovaries
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Which of these is unique to flowering plants?
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In flowering plants one sperm nucleus fertilizes the egg and the other sperm nucleus fuses with two other nuclei found within the ovule, thus forming triploid endosperm. Double fertilization
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The male gametophytes of flowering plants are also referred to as _____.
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Pollen Grains
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In flowering plants the integuments of the ovule develop into a(n) _____.
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Seed coat
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A carpel is composed of _____.
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stigma, style, and ovary
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A stamen consists of _____.
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anther and filament
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In angiosperms, pollination is the transfer of pollen grain to the _____ of a flower on the same plant or another plant of the same species.
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Stigma
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Stamens, sepals, petals, carpels, and pinecone scales are all _____.
answer
Modified leaves
question
Which of the following sex and generation combinations directly produces the pollen tube of angiosperms?
answer
male gametophyte