Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Textbook Question
Chapter 43, Problem 2RQ
Describe the structure and function of the four extraembryonic membranes found in reptiles, including birds. Are these four present in placental mammals? In what ways are their roles similar in reptiles and mammals? How do they differ?
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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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- How are mammalian extraembryonic membranes formed?arrow_forwardDraw three mammalian fetuses of different classes. What are the notable features that are common to these three animal fetuses even if they are not related?arrow_forwardAsap what evolutionary advantages does the amniotic egg have? explain how each component of the egg plays a role in survival of the embryo.arrow_forward
- What is a vestigial structure? What are some examples of vestigialstructures in humans and other animals?arrow_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_forwardZygote Embryo Muscle cells Intestinal cells Liver cells Blood cells Nerve cell Cardiac cells (1) Specialization occurs, resulting in the formation of a great variety of cell types. (2) Genes are inserted into the zygote to allow for the formation of different cell types. (3) The expression of genes responsible for the different cell types is controlled by the placenta. (4) The genetic information in the zygote is divided to produce a complete set for each cell typearrow_forward
- Wouldn't the presence of myomeres in vertebrates be neither symplesiomorphic no synapomorphic when we look at the group alone? Aren't symplesiomorphic and syapomorphic terms used in comparison to the features of other organisms?arrow_forwardWhat four types of cellular processes must occur to enable a fertilized egg to develop into an adult multicellular animal? Briefly discuss the role of each process. C2. The arrangement of body axes of the discuss the role of each process.arrow_forwardThis question is about mammals. a) What is the one defining characteristic that determines a mammal? b) Compare and contrast the three types of mammals with respect to fetal development and birth: the monotremes (such as the platypus), the marsupials (such as kangaroos), and the placentals (such as humans or dogs). That is, where does most of the early development occur, how is the young mammal introduced to the world, and how does the young obtain nourishment once introduced to the world?arrow_forward
- Describe and distinguish patterns of reproduction in monotremes, marsupials, and placental mammals. What aspects of mammalian reproduction characterize all mammals but no other vertebrates?arrow_forwardDescribe how embryonic development determines certain coat patterns in animals.arrow_forwardDistinguish two mechanisms by which flatworms supply yolk for their embryos. Which system is evolutionarily ancestral for flatworms and which one is derived?arrow_forward
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