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Identify each of the following structures as haploid or diploid.
(A) sporophyte
(B) spore
(C) gametophyte
(D) zygote
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- In most female gametophytes with eight nuclei, only the egg and the central cell nuclei do not degenerate. What would happen if the megaspore itself functioned as an egg and did not go on to produce other nuclei in a female gametophyte?Which of the following lettered structures is the female gametophyte?Is gamete producing hiploid gametophyte and spore produce diploid sporophytes?
- What would happen if the megaspore itself functioned as an egg and did not go on to produce other nuclei in a female gametophyte?Each ascus within an ascomycete fruiting body contains eight cells. Are these cells haploid, diploid, or dikaryotic? Is every cell within an ascus genetically unique? What is the fate of each cell?How does a haplontic plant population maintain genetic diversity? a. Zygotes are produced by random fusion. b. Gametes are created through meiosis. c. Diploid spores undergo independent assortment during mitosis. d. The zygote undergoes meiosis to generate a haploid sporophyte.
- Male gametophytes in the pine tree are produced by which of the following processes? -Gametogenesis -Mitosis -Neither mitosis nor meiosis -Meiosis -Microsporophyte generationWhich two structures evolved though a series of changes in the reproductive biology among some heterosporous plants during the late Devonian period allowed spermatophytes (seed plants) to reduce or eliminate their dependence on water for gamete fertilization and development of the embryo and allowed them to colonize a much wider range of habitats?With a neat diagram explain the 7-celled, 8-nucleate nature of the femalegametophyte
- Both antheridia and archegonia are on the same gametophyte. Is the gameto-phyte dioecious or monoecious?Which of the following pairs of plant structure has the haploid number ofchromosomes? A. Megaspore mother cell and antipodal cells B. Egg cell and antipodal cells C. Egg cell and endosperms D. Microspore mother cell and antipodal cellsIn plant life cycles, (a) the first products of meiosis are gametes (b) spores are part of the diploid sporophyte generation (c) the embryo gives rise to a zygote (d) the first stage in the diploid sporophyte generation is the zygote (e) the first stage in the haploid gametophyte generation is the prothallus