Compare and contrast the exterior anatomy of the pig to the shark and the lamprey. What has changed? What has stayed the same? What are the benefits of these changes?

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Compare and contrast the exterior anatomy of the pig to the shark and the lamprey. What has changed? What has stayed the same? What are the benefits of these changes? 

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Comparative anatomy of animals helps us understand how the body structures in each of the animals is similar or different. The similarities and differences pen out how different species have adapted to survive and how closely or distinctly they are related to the other species. 

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