Bio Ch. 26 Part A

The generative cell of male angiosperm gametophytes is haploid. This cell divides to produce two haploid sperm cells. What type of cell division does the generative cell undergo to produce these sperm cells?The generative cell of male angiosperm gametophytes is haploid. This cell divides to produce two haploid sperm cells. What type of cell division does the generative cell undergo to produce these sperm cells?
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The generative cell of male angiosperm gametophytes is haploid. This cell divides to produce two haploid sperm cells. What type of cell division does the generative cell undergo to produce these sperm cells?The generative cell of male angiosperm gametophytes is haploid. This cell divides to produce two haploid sperm cells. What type of cell division does the generative cell undergo to produce these sperm cells?
mitosis
Mitotic activity by the apical meristem of a root makes which of the following more possible?
Increase of the above ground stem.
Which taxon is essentially equivalent to the "embryophytes"?
Plantae
In addition to seeds, which of the following characteristics is unique to the seed-producing plants?
pollen
The following question refers to the generalized life cycle for land plants shown in the figure. In the figure, which processes may result in haploid structures during the generalized life cycle for land plants?
mitosis and meiosis
If the kingdom Plantae is someday expanded to include the charophytes, then the shared derived characteristics of the kingdom will include
1, 2, 4, and 5 only
Which of the following were benefits to algae in the early oceans of Earth, compared to the first plants that colonized land? 1. no scarcity of water 2. less solar damage to tissues 3. the need for structural support 4. more plentiful dissolved carbon dioxide
1, 2, and 4
How have fruits contributed to the success of angiosperms?
by facilitating dispersal of seeds
Angiosperms are the most successful terrestrial plants. Which of the following features is unique to them and helps account for their success?
fruits enclosing seeds
Which of the following would have had gene sequences most similar to the charophyte that was the common ancestor of the land plants?
early bryophytes
A biology student hiking in a forest happens upon an erect, 15-cm-tall plant that bears microphylls and a strobilus (a cone) at its tallest point. When disturbed, the cone emits a dense cloud of brownish dust. The student takes the dust back to the laboratory, where a microscope reveals the dust to be composed of tiny spheres with a high oil content. This student has probably found alycophyte sporophyte.Which of the following sex and generation combinations most directly produces the megasporangium of pine ovules?female sporophyteWhich of the following characteristics of plants is absent in their closest relatives, the charophyte algae?alternation of generationsWhich structure is common to both gymnosperms and angiosperms?ovuleAdaptations in plants to life on land includeI. rings of cellulose-synthesizing complexes.II. cuticles.III. tracheids.IV. reduced gametophyte generation.V. multicellular, dependent embryos.II, III, IV, and V onlyUsing Figure 26.5, which of the following taxonomic groups from the list below would you expect to have a genome with DNA sequences most similar to the Plantae?other charophytesThe seed coat's most important function is to provideprotection for the embryo.Considering that the mature sporophytes of true mosses 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?Sporophytes are parasites of gametophytes.On a field trip, a student in a marine biology class collects an organism that has differentiated organs, cell walls of cellulose, and chloroplasts with chlorophyll a. Based on this description, the organism could be a brown alga, a red alga, a green alga, a charophyte recently washed into the ocean from a freshwater or brackish water source, or a land plant washed into the ocean. The presence of which of the following features would definitively identify this organism as a land plant?embryosWhich group is noted for the independence of gametophyte and sporophyte generations from each other?fernsArrange the following in the correct sequence, from earliest to most recent, in which these plant traits originated.1. sporophyte dominance, gametophyte independence2. sporophyte dominance, gametophyte dependence3. gametophyte dominance, sporophyte dependence3 → 1 → 2Which of the following is a true statement about angiosperm carpels?Carpels surround and nourish the female gametophyte.Gymnosperms differ from both extinct and extant (living) ferns because theyhave pollenWhich of the following is a true statement about plant reproduction?In bryophytes, the dominant generation consists of haploid gametophytes.Which of the following statements correctly describes a portion of the pine life cycle?female gametophytes use mitosis to produce eggs.The leaflike appendages of moss gametophytes may be one to two cell layers thick. Consequently, which of the following is least likely to be found associated with such appendages?stomataThe following question refers to the generalized life cycle for land plants shown in the figure.Meiosis, as part of the alternation of generations in land plants, produceshaploid spores.Challenges for survival of the first land plants includeI. sources of water.II. sperm transfer.III. desiccation.IV. animal predation.V. lack of structural support.I, II, III, and V onlyA botanist discovers a new species of land plant with a dominant sporophyte, chlorophylls a and b, and cell walls made of cellulose. In assigning this plant to a phylum, which of the following, if present, would be least useful?sporesThe following question refers to the generalized life cycle for land plants shown in the figure.In the figure, which structure produces haploid gametes by mitosis?Gametophyte