Our Origins: Discovering Physical Anthropology (Fourth Edition)
Our Origins: Discovering Physical Anthropology (Fourth Edition)
4th Edition
ISBN: 9780393614008
Author: Clark Spencer Larsen
Publisher: W. W. Norton & Company
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Chapter 5, Problem 1ER
Summary Introduction

To define: Bergmann’s rule and Allen’s rule in association with climate adaptation.

Introduction:  The Bergmann’s rule indicates that as latitude increases, the breadth of the body also increases. However, the Bergmann's rule is applied to all the warm-blooded animals, for example, human, which must regulate its body temperature.

Summary Introduction

To give: An example of an environmental factor, which may result in the body-shape development and which can deviate from the Bergmann’s and Allen’s rule.

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Bergman's and Allen's rules apply to many animals, not just humans. Look at the following images of two different hare species. Based on what you can see in the images and using only Bergmann's Rule and Allen's Rule, which of these hares is adapted for a cold climate and which is adapted for a hot climate? What adaptations do they have to suit their environments? Do humans living in similar environments share the same adaptations? Remember, you must use Bergman's and Allen's rules in your analysis, so be sure you know these rules and refer to them.
Can you think of any other adaptations to extreme environments found in humans or other animals? How do those adaptations compare to the adaptation being studied here?
Why is natural selection the only agent of evolution that consistently produces adaptation?
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