Biology
11th Edition
ISBN: 9781259188138
Author: Peter H Raven, George B Johnson Professor, Kenneth A. Mason Dr. Ph.D., Jonathan Losos Dr., Susan Singer
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 31, Problem 4U
In a pine tree, the microspores and megaspores are produced by the process of
a. fertilization.
b. mitosis.
c. fusion.
d. meiosis.
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Compare what happens to a spore mother cell as it gives rise to a spore with what happens to a spore as it gives rise to a gametophyte.
a. The spore mother cell and the spore both go through meiosis.
b. The spore mother cell and the spore both go through mitosis.
c. The spore mother cell goes through mitosis, and the spore goes through meiosis.
d. The spore mother cell goes through meiosis, and the spore goes through mitosis.
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 cells
Alternation of generations describes which of the following? a. The haploid form can be multicellular; the diploid form is unicellular. b. The haploid form is unicellular; the diploid form can be multicellular. c. Both the haploid and diploid forms can be multicellular. d. Neither the haploid nor the diploid forms can be multicellular.
Chapter 31 Solutions
Biology
Ch. 31 - The lack of seeds is a characteristic of all a....Ch. 31 - Prob. 2UCh. 31 - Which of the following gymnosperms possesses a...Ch. 31 - In a pine tree, the microspores and megaspores are...Ch. 31 - Which of the following terms is NOT associated...Ch. 31 - Which of the following potentially represents the...Ch. 31 - Prob. 7UCh. 31 - Prob. 8UCh. 31 - The pericarp is the a. ovary wall. b. developing...Ch. 31 - Reproduction in angiospenns can occur more quickly...
Ch. 31 - In double fertilization, one sperm produces a...Ch. 31 - Apply your understanding of angiosperms to...Ch. 31 - Comparing stems of two plant specimens under the...Ch. 31 - Prob. 5ACh. 31 - Fruits are complex organs that are specialized for...Ch. 31 - You haw been hired as a research assistant to...Ch. 31 - Assess the benefits and drawbacks of...Ch. 31 - The relationship between flowering plants and...Ch. 31 - Prob. 4S
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- The products of budding are a. two cells of equal size. b. two cells, one of which is smaller than the other. c. many cells of equal size. d. many cells of variable size.arrow_forwardWhich of the following is an advantage of asexual reproduction? a. Cuttings taken from an adult plant show increased resistance to diseases. b. Grafted plants can more successfully endure drought. c. When cuttings or buds are taken from an adult plant or plant parts, the resulting plant will grow into an adult faster than a seedling. d. Asexual reproduction takes advantage of a more diverse gene pool.arrow_forwardIn the alternation of generations in plants, the gametophyte is _______ and produces gametes by _______. a. haploid; mitosis c. haploid; meiosis b. diploid; mitosis d. diploid; meiosisarrow_forward
- Mitotic Cell division occurs in dogs, potato, zebra, and parrots cells. Which character will be absent in potato plants but present in dogs, zebra, and parrots cells? a. Root apical meristems are present where mitosis occurs. b. The resulting cells will contain exact numbers of chromosomes comparing parental cells. c. Star shaped Aster formation occurs around centrioles. d. Cell plate formation occurs.arrow_forwardList the two types of haploid cells that are fertilized in a plant's double fertilization. What do they form in the seed? And how could a forest fire be beneficial to a seed.arrow_forwardWhat is the ploidy of two daughters of a dividing cell of a hornwort’s gametophyte? Select one: a. aploid b. diploid c. none of these choices d. haploid e. triploid f. tetraploidarrow_forward
- Which of the following IS found in basal land plants (Embryophyta), but NOT found in Chara?a. Multicellular gametangia with sterile jacket.b. Diploid mitosis.c. Photoautotrophous gametophyted. Haploid mitosis.e. Sperm cells with two flagellaarrow_forwardThe megaspore and the microspore mother cellsa. both produce pollen grains.b. both divide meiotically.c. both divide mitotically.d. produce pollen grains and embryo sacs, respectively.e. All of these are correct.arrow_forwardChoose the statement that is true.a. All flowers are pollinated by bees.b. Apple trees are propagated by grafting because they are triploid.c. Carpels function to attract pollinators.d. A coleoptile protects the plumule of eudicot seedlings.e. The arrival of pollen on a receptive seed is called pollination.f. In plants, sperm cells are male gametes.g. Nutrients in fruits nourish new seedlings.arrow_forward
- 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.arrow_forward1.Embryogenesis follows while the ovary matures into fruit.B. The ovule becomes the seed. A.If both statements are correct. B.If statement A is wrong and B is correct. C.If statement A is correct and B is wrong. D.If both statements are wrong. 2. A. An embryo sac (ovule) contains eight haploid nuclei.B. Three nuclei become three synergids, 2 polar nuclei, 3 antipodal nuclei. A.If statement A is wrong and B is correct. B.If both statements are wrong. C.If both statements are correct. D.If statement A is correct and B is wrong. 3. A. Inside a pollen grain there is a tube cell and generative cell. B. Generative cell divides to produce two sperm cells while the tube cell becomes pollen tube elongates along the style. A.If both statements are correct. B.If statement A is wrong and B is correct. C.If statement A is correct and B is wrong. D.If both statements are wrong.arrow_forwardMeiosis occurs within the: A. Endosperm B. Petal C. Ovary D. Ovule E. Stigmaarrow_forward
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