Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Textbook Question
Chapter 32, Problem 2TYK
The process during which the germ layers are established is
- a. gastrulation.
- b. blastulation.
- c. metamorphosis.
- d. cleavage.
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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.
Which 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.
Gastrulation does NOT
Select one:
a. involve the formation of germ layers
b. consist of endoderm, mesoderm, and ectoderm
c. result in the formation of a third layer in the embryonic disk
d. include the differentiation of cells into tissues and organs
Chapter 32 Solutions
Study Guide for Campbell Biology
Ch. 32 - a. What is a larva? b. How does a larva differ...Ch. 32 - Describe the three hypotheses for the rapid...Ch. 32 - Prob. 3IQCh. 32 - Prob. 4IQCh. 32 - Fill in the blanks in the following simplified...Ch. 32 - Prob. 1TYKCh. 32 - The process during which the germ layers are...Ch. 32 - Prob. 3TYKCh. 32 - Prob. 4TYKCh. 32 - Prob. 5TYK
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- A gastrulation does NOT Select one: A. Consist of endoderm, mesoderm, and ectoderm B. Result in the formation of a third layer in the embryonic disc C. Involve the formnation of germ layers D. Include the differentiation of cells into tissues and organsarrow_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_forwardThe outer layer of the blastocyst that attaches to the wall of theuterus at implantation is called thea. amnion.b. yolk sac.c. embryoblast.d. trophoblast.arrow_forward
- Which of the following statements is incorrect?a. The placenta secretes hormones such as progesterone, hCG, and estrogen.b. Embryonic tissue and maternal tissue forms the placenta.c. The chorion supplies nutrients to the embryo by diffusion.d. The umbilical cord is formed by one artery and two veinsarrow_forwardThe embryo proper develops from thea. inner cell mass.b. trophoblast.c. blastocele.d. yolk sac.arrow_forwardWhich of the following structures develops into only the fetus? a. Inner cell mass b. Trophoblast c. Blastocyst d. Zygotearrow_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_forwardOf the following processes, which occurs last during embryonic development?a. cleavageb. neurulationc. gastrulationd. fertilizationarrow_forwardInternal 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 fertilizersarrow_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_forwardOdontoblasts are derived from a. Ectoderm b. Endoderm c. Histiocytes d. Undifferentiated mesenchymal cellsarrow_forwardWhich of the following statements is NOT correct about the umbilical cord? a. The umbilical cord is formed from the yolk sac and the allantois. b. The umbilical cord is formed from the chorion. c. The umbilical cord consists of two arteries and one vein. d. The placenta connects to the embryon via the umbilical cord.arrow_forward
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Embryology | Fertilization, Cleavage, Blastulation; Author: Ninja Nerd;https://www.youtube.com/watch?v=8-KF0rnhKTU;License: Standard YouTube License, CC-BY