Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Chapter 43, Problem 2AC
Summary Introduction
To explain:
The reason for the difference in shape of animal eggs which have little egg yolk and spherical blastula stage as compared to the mammalian eggs which have flat embryonic discs and virtually no egg yolk.
Introduction:
Animal eggs contain large amounts of yolk with formation of animal pole and vegetal pole. There is a blastocoel cavity with formation of deep cells and superficial cells formed during the process of cell division. There is a formation of dorsal blastopore lip during which forms archenteron, mesoderm and endoderm. Mammalian eggs have less amount of yolk which is a source of the supply of lipids and nutrients in the blood.
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Chapter 43 Solutions
Biology
Ch. 43.1 - define development and describe how cell division...Ch. 43.2 - Prob. 1CYLCh. 43.3 - describe early development in amphibians,...Ch. 43.3 - Prob. 2CYLCh. 43.4 - Prob. 1TCCh. 43.4 - Prob. 2TCCh. 43.4 - Does the development of a human limb, and the rest...Ch. 43.4 - Prob. 1CYLCh. 43.4 - Prob. 2CYLCh. 43.5 - Prob. 1TC
Ch. 43.5 - Prob. 1CSCCh. 43.5 - Prob. 2TCCh. 43.5 - Prob. 3TCCh. 43.5 - Prob. 1HYEWCh. 43.5 - describe human embryonic development from...Ch. 43.5 - describe the structure and function of the...Ch. 43.5 - Prob. 3CYLCh. 43.6 - Prob. 1TCCh. 43.6 - Prob. 1CYLCh. 43.6 - Prob. 2CYLCh. 43.6 - Prob. 3CYLCh. 43.6 - Prob. 2TCCh. 43 - Prob. 1MCCh. 43 - Animals with Indirect development a. develop...Ch. 43 - Prob. 3MCCh. 43 - Prob. 4MCCh. 43 - Prob. 5MCCh. 43 - Prob. 6MCCh. 43 - Prob. 7MCCh. 43 - Prob. 8MCCh. 43 - Prob. 1FIBCh. 43 - Prob. 2FIBCh. 43 - Prob. 3FIBCh. 43 - Prob. 4FIBCh. 43 - Distinguish between direct and indirect...Ch. 43 - Describe the structure and function of the four...Ch. 43 - What is gastrulation? Describe gastrulation in...Ch. 43 - Prob. 4RQCh. 43 - Prob. 5RQCh. 43 - In humans, where does fertilization occur, and...Ch. 43 - Prob. 7RQCh. 43 - Prob. 8RQCh. 43 - How do changes in the breast prepare a mother to...Ch. 43 - Prob. 10RQCh. 43 - Prob. 1ACCh. 43 - Prob. 2AC
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- A mammalian embryo puts the trophoblast into a hurried frenzy before it decides to proceed to the business of gastrulation. Is it a Clever move, or an evolutionary blunder? Explain wellarrow_forwardWith regard to early cleavage in the sea urchin, is the entire zygote involved in early cleavage? What happens to the size of cells as the cell number increases? Do they get bigger or smaller in these early stages? How does the size of these cells compare to the size of the original fertilized egg?arrow_forwardIn animal phyla with radial cleavages, cell fate of the embryo is?arrow_forward
- Describe the process of mammalian and avian gastrulationarrow_forwardFrom a 24-hour chick embryo, provide the answers in the following: Pairs of somites in a 24-hour chick embryo Germ layer/s that forms the head process What begins the formation head of process Germ layer/s that form the proamnion Explain why the notochord is not visible in areas where the somites are seenarrow_forwardRegarding mammals, amphibians, and reptiles, explain thoroughly in what way does the inert yolk's mass affects their gastrulation?arrow_forward
- Asap what evolutionary advantages does the amniotic egg have? explain how each component of the egg plays a role in survival of the embryo.arrow_forwardWrite in detail the process of organogenesis in vertebrates. Give one example and make diagram also.arrow_forwardDescribe the step-by-step fertilization process in an amphibian. (Please include the structures involved in the process.)arrow_forward
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