Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 50, Problem 7TYK
Summary Introduction
Introduction:
In mammals, the embryonic development involves nourishment of the embryo by the placenta. This placenta is responisble for supplying nutrients and oxygen to the embryo, and carrying away the nitrogenous waste and carbon dioxide.
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In the development of the nervous system, one of the following is false?
O a. The neural tube maintains temporary contact with the yolk sac cavity via neuropores.
O b. The neural tube develops from ectoderm.
O c. The neural groove forms from the neural plate.
d. The neural folds are composed of neuroectoderm cells.
e. The ectoderm fuse to cover the neural crest & the neural tube is the surface ectoderm.
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In the development of the nervous system, one of the following is false?
The neural tube maintains temporary contact with the yolk sac cavity via neuropores.
O a.
O b. The neural tube develops from ectoderm.
O c. The neural groove forms from the neural plate.
d. The neural folds are composed of neuroectoderm cells.
O e.
The ectoderm fuse to cover the neural crest & the neural tube is the surface ectoderm
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During morphogenesis, gastrulation does which of the following?A. Gastrulation produces the ectoderm through formation of a blastocyst.B. Gastrulation produces the mesoderm to form the lining of the digestive tract.C. Gastrulation provides the mechanisms whereby cells can form the neural tube.D. Gastrulation produces the endoderm through invagination of the blastula.
Chapter 50 Solutions
Biology: The Dynamic Science (MindTap Course List)
Ch. 50.1 - Prob. 1SBCh. 50.1 - Prob. 2SBCh. 50.2 - Prob. 1SBCh. 50.2 - Prob. 2SBCh. 50.2 - Prob. 3SBCh. 50.3 - Prob. 1SBCh. 50.3 - Prob. 2SBCh. 50.4 - Prob. 1SBCh. 50.4 - Prob. 2SBCh. 50.5 - Prob. 1SB
Ch. 50.5 - Prob. 2SBCh. 50.5 - Prob. 3SBCh. 50 - Prob. 1TYKCh. 50 - Prob. 2TYKCh. 50 - Prob. 3TYKCh. 50 - Prob. 4TYKCh. 50 - Prob. 5TYKCh. 50 - Prob. 6TYKCh. 50 - Prob. 7TYKCh. 50 - In the development of the female sex organs: a....Ch. 50 - In the embryonic development of the eye: a. the...Ch. 50 - Prob. 10TYKCh. 50 - Discuss Concepts Experimentally, it is possible to...Ch. 50 - Discuss Concepts Developmental biologist Lewis...Ch. 50 - Discuss Concepts Arguably, in sexually reproducing...Ch. 50 - Prob. 14TYKCh. 50 - Prob. 15TYKCh. 50 - Prob. 16TYKCh. 50 - Prob. 1ITDCh. 50 - Prob. 2ITDCh. 50 - Prob. 3ITDCh. 50 - Prob. 4ITD
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- The seven-day blastocyst: A. has a single layer of trophoblast at the embryonic pole B. has an amniotic cavity C. is attached to the endometrial epithelium D. is surrounded by a degenerating zona pellucida E. is called the hypoblastarrow_forwardGastrulation 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 organsarrow_forwardA 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_forward
- The inner cell mass of a human blastocysta. gives rise to the chorion.b. gives rise to the placenta.c. gives rise to the embryo.d. consists of highly differentiated cells.arrow_forwardWhich 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_forwardIdentify a characteristic of a fetus in the sixth month of gestation. a. It weighs between 5 and 7 pounds. b. It can open and close its eyes and look in all directions. c. It has fully developed reflex patterns. d. It has a respiratory system that is adequate to survive outside the womb.arrow_forward
- The 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_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 zona pellucida is important in mammals because it... a. induces polyspermy. b. induces compaction. c. inhibits implantation of the embryo until the embryo reaches the uterus. d. inhibits the formation of twins.arrow_forward
- Observations 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_forwardIf cells from the presumptive neural ectoderm of a frog gastrula are transplanted onto the surface of a second gastrula where skin would normally develop, the transplanted cells will still develop into tissues of the nervous system. This experiment shows that the transplanted cells areA. differentiated.B. totipotent.C. discontinuous.D. determined.E. endodermal.arrow_forwardWhich of the following structures develops into only the fetus? a. Inner cell mass b. Trophoblast c. Blastocyst d. Zygotearrow_forward
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