Campbell Biology In Focus, Loose-leaf Edition (3rd Edition)
3rd Edition
ISBN: 9780134895727
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky
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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Chapter 30 Solutions
Campbell Biology In Focus, Loose-leaf Edition (3rd Edition)
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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- 1.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_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
- Somites a. begin forming at the tail end of the embryo and then move forward in a wavelike fashion. b. are derived from endoderm. c. develop into only one type of tissue per somite. d. may vary in number from one species to the next.arrow_forwardExplain the main steps of sea urchin fertilization. Your answer should emphasis the respective functions of SAPs, Bindin, fertilization cone, cortical granules and fertilization envelopearrow_forwardEgg and sperm cells are... A. Gametes B. Diploid C. Somatic cells D. Zygotesarrow_forward
- Is this true or false? a. Fertilization is followed by a cleavage, a period of rapid cell division without growth. b. From the process above, this results in the production of a large number of cells called blastomeres. c. In sexual reproduction, the offspring have the same combinations of genes as their parents. d. Sequential hermaphroditism occurs when an animal is one sex during one phase of its lifecycle and the opposite sex during another phasearrow_forwardelect one: A. Process 1 Which of the processes illustrated above represents fertilization? B. Process 2 Process 3 Process 4 Process 2 Zygote The Life Cycle of the Horse Embryo Process 1 Gametes Process 3 Reproductive organs Process 4arrow_forwardFigure 14.19 At what stage does the diploid zygote form? a. When the female cone begins to bud from the tree b. When the sperm nucleus and the egg nucleus fuse c. When the seeds drop from the tree d. When the pollen tube begins to growarrow_forward
- What are the correct pairings of developing and embryonic structures in the gastrulation of chickens? a. Epiblast- ectoderm c. Primary hypoblast-endoderm Read the following statements CAREFULLY: I. II. III. IV. b. Secondary hypoblast - endoderm d. Migrating cells - mesoderm The germ band needs to retract for fruit fly segments to develop properly. The formation of the sea urchin archenteron is made possible by epithelial cells that underwent epithelial-to-mesenchymal transition. Frog gastrulation involves the epiboly of endoderm cells. Chicken endoderm and mesoderm is formed through the migration of cells through both the anterior and posterior end of the primitive streak. a. All choices are true b. I & Il are true but IV is false d. IV is sometimes true c. Ill is falsearrow_forwardDuring gastrulation, cells from the _____ layer of the bilaminar germinal disc migrate and form the three primary germ layers. a. notochord b. hypoblast c. epiblast d. mesoblastarrow_forwardIn the course of double fertilization, one sperm cell fuses with the egg and the second one fuses with ________. a. the synergids b. the polar nuclei of the center cell c. the egg as well d. the antipodal cellsarrow_forward
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