Campbell Biology In Focus
2nd Edition
ISBN: 9780134203072
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Textbook Question
Chapter 30, Problem 3TYU
Double fertilization means that
- A. flowers must be pollinated twice to yield fruits and seeds.
- B. B every egg must receive two sperm to produce an embryo
- C. C one sperm is needed to fertilize the egg, and a second sperm is needed to fertilize the polar nuclei.
- D. every sperm has two nuclei
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Students have asked these similar questions
A. How is embryogenesis defined in plants?
B. What developmental event can mark the “end” of embryogenesis?
C. Does embryogenesis occur in all plants?
At this stage of embryogenesis, the plant embryo forms eight cells. In Arabidopsis thaliana,
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of the embryo proper in the embryo.
A. Octant stage
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O C. Globular stage
D. Heart stage
Internal and external fertilization differ in that species thata. produce an amniotic egg have internal fertilization.b. without an amniotic egg have external fertilization.c. produce live young have mammary glands.d. lay eggs are external fertilizers
Chapter 30 Solutions
Campbell Biology In Focus
Ch. 30.1 - WHAT IF? If flowers had shorter styles, pollen...Ch. 30.1 - WHAT IF? In some species, sepals look like petals,...Ch. 30.1 - Prob. 3CCCh. 30.2 - Prob. 1CCCh. 30.2 - Prob. 2CCCh. 30.2 - Self-fertilization, or selfing, seems to have...Ch. 30.3 - Prob. 1CCCh. 30.3 - Why does Bt maize have less fumonisin than non-GM...Ch. 30.3 - WHAT IF? In a few species, chloroplast genes are...Ch. 30 - A seed develops from an A. ovum B. embryo. C....
Ch. 30 - A fruit is a A. mature ovary. B. B . mature ovule....Ch. 30 - Double fertilization means that A. flowers must be...Ch. 30 - Golden Rice A. is resistant to various herbicides,...Ch. 30 - Which statement concerning grafting is correct? A....Ch. 30 - Some dioecious species have the XY genotype for...Ch. 30 - A small flower with green petals is most likely A....Ch. 30 - The pollen produced by wind-pollinated plants is...Ch. 30 - The black dots that cover strawberries are...Ch. 30 - DRAW IT Draw a flower and label the parts.Ch. 30 - SCIENTIFIC INQUIRY Critics of GM foods have argued...Ch. 30 - SCIENCE, TECHNOLOGY, AND SOCIETY People have...Ch. 30 - FOCUS ON EVOLUTION With respect to sexual...Ch. 30 - FOCUS ON ORGANIZATION In a short essay (100-150...Ch. 30 - SYNTHESIZE YOUR KNOWLEDGE This colorized SEM shows...
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- Choose 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_forwardWhich of the following is not an important component of the slow block to polyspermy Group of answer choices A. depolarization of the cell B. a physical space between the cell membrane and the fertilization envelope C. hardening of the vitelline layer and jelly coat to form the fertilization envelopearrow_forwardWhich of the following statements regarding plants is false?a. Meiosis within anthers produces spores that develop intopollen.b. Meiosis within ovules produces spores that develop into anembryo sac.c. The male gametophyte is a pollen grain, and the femalegametophyte is an embryo sac.d. Meiosis directly produces sperm and egg cells in plantsarrow_forward
- 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_forwardAltemate response C. If statement A is correct and B is wrong. D. If statement A is wrong and B is correct. A. f both statements are correct. B. H both statements are wrong. numorous microsporocytes which will undearrow_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_forward
- Mention the site of zygote formation in the ovule of a flowering plant. What happens to sepals, petals and stamens after fertilisation? State the fate of zygote, ovule and ovary in these plants.arrow_forwardA. 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.arrow_forwardObservations of the developing chick embryo reveal that skeletal muscles develop from the transplanted somites even though motor neurons innervating those muscles arise from chick neural crest cells. Based on these observations, what is MOST likely true? A. Neural crest cells differentiate into somites. B. Neural crest cells fuse with developing somite cells. C. Neural crest cells develop from migrating somite cells. D. Neural crest cells send projections into developing somites.arrow_forward
- Double fertilization means that(A) flowers must be pollinated twice to yield fruits and seeds.(B) every egg must receive two sperm to produce an embryo.(C) one sperm is needed to fertilize the egg, and a second spermis needed to fertilize the polar nuclei.(D) every sperm has two nucleiarrow_forwardWhat are the products of double fertilization?a. Two diploid zygotesb. A diploid zygote and a triploid endospermc. A haploid sperm and a diploid zygoted. A triploid zygotearrow_forwardWhat is the relationship between pollination and fertilization in flowering plants? Select one: a. Fertilization precedes pollinations. b. If fertilization occurs, pollination would be unnecessary. c. Pollination brings gametophytes together so that fertilization can occur. d. Pollination easily occurs between plants of different species.arrow_forward
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