EBK CAMPBELL BIOLOGY IN FOCUS
2nd Edition
ISBN: 8220101459299
Author: Reece
Publisher: PEARSON
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Textbook Question
Chapter 36, Problem 2TYU
The cortical reaction of sea urchin eggs functions directly in
- A. the formation of a fertilization envelope.
- B. the production of a fast block to polyspermy.
- C. the generation of an electrical impulse by the egg.
- D. the fusion of egg and sperm nuclei.
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A chemical that prevents acrosomal proteins from interacting with proteins on the egg membrane would have which of the following immediate effects (i.e. which would happen first)?
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Chapter 36 Solutions
EBK CAMPBELL BIOLOGY IN FOCUS
Ch. 36.1 - Prob. 1CCCh. 36.1 - Prob. 2CCCh. 36.1 - MAKE CONNECTIONS What examples of plant...Ch. 36.2 - Prob. 1CCCh. 36.2 - Why might using a hot tub frequently make it...Ch. 36.2 - Prob. 3CCCh. 36.2 - WHAT IF? If each vas deferens in a male was...Ch. 36.3 - Prob. 1CCCh. 36.3 - How does an estrous cycle differ from a menstrual...Ch. 36.3 - Prob. 3CC
Ch. 36.4 - Prob. 1CCCh. 36.4 - Prob. 2CCCh. 36.4 - Prob. 3CCCh. 36 - Prob. 1TYUCh. 36 - The cortical reaction of sea urchin eggs functions...Ch. 36 - Prob. 3TYUCh. 36 - Prob. 4TYUCh. 36 - Prob. 5TYUCh. 36 - Which of the following statements is true? A. All...Ch. 36 - For which is the number the same in males and...Ch. 36 - Prob. 8TYUCh. 36 - Prob. 9TYUCh. 36 - Prob. 10TYUCh. 36 - FOCUS ON EVOLUTION Hermaphroditism is more often...Ch. 36 - Prob. 12TYUCh. 36 - Prob. 13TYU
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- In humans, fertilization usually occurs in thea. fimbriae.b. vagina.c. uterus.d. uterine tubes.arrow_forwardThe embryos of complex multicellular animals must establish spatial coordinates if development is to proceed. An important reference coordinate for developing frogs is theA. location of the vegetal pole.B. location of the animal pole.C. point of sperm penetration.D. location where gastrulation begins.E. direction of the sun.arrow_forwardThe formation of three germ layers is called Select one: a. gastrulation b. pluripotency c. differentiation d. neurulationarrow_forward
- Which of the following is false? a. The endoderm, mesoderm, ectoderm are germ layers. b. The trophoblast is a germ layer. c. The inner cell mass is a source of embryonic stem cells. d. The blastula is often a hollow ball of cells.arrow_forwardSea urchins exhibit a holoblastic cleavage pattern. What factor contribute to this cleavage pattern? a. The amount/distribution of yolk b. Conditional specification of the vegetal layer by large micromeres c. The angle of the mitotic spindle and its time of formation d. Maternal factorsarrow_forwardWhich of the following statements is false? a. Cadherins, but not integrins play a role in gastrulation. b. Gastrulation creates the primary germ layers c. Gastrulation requires cells to change their gene expression. d. Body axes are stabilized (made permanent) during gastrulation.arrow_forward
- Of the following processes, which occurs last during embryonic development?a. cleavageb. neurulationc. gastrulationd. fertilizationarrow_forwardWhich of the following correctly describes hermaphroditism? A. It is an example of sexual reproduction because it involves a male and a female. B. It is an example of asexual reproduction because only one individual needs to be involved. C. It is an example of sexual reproduction because it involves fusion of two gametes. D. It is an example of asexual reproduction because the offspring are genetically identical to the parent.arrow_forwardAlong the notochord, segmented blocks of tissue that give rise to muscles, vertebrae, and connective tissues are calleda. neural crests.b. morulas.c. primitive streaks.d. somitesarrow_forward
- Which of the following organisms would NOT undergo gastrulation? a. fungi and sponges b. worms and snails c. nematodes d. those with only one opening for food and waste (protostomes)arrow_forwardWhat 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_forwardWhich of the following statements about gastrulation is correct? A. During gastrulation, the contents of cell nuclei begin to vary so that they can start to perform different fucntions. B. During gastrulation, cells differentiate so that they can start to perform different functions. C. The formation of the endoderm, mesoderm, and ectoderm occurs after gastrulation. D. The formation of the endoderm, mesoderm, and ectoderm occurs before gastrulation.arrow_forward
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