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Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
Publisher: Cengage Learning
ISBN: 9781305389892
BuyFind

Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
Publisher: Cengage Learning
ISBN: 9781305389892

Solutions

Chapter
Section
Chapter 1, Problem 12TYK
Textbook Problem
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What role did the copper lizard models play in the field study of temperature regulation?

a. They attracted live lizards to the study site.

b. They measured the temperatures of live lizards.

c. They established null hypotheses about basking behavior and temperatures.

d. They scared predators away from the study site.

e. They allowed researchers to practice taking lizardtemperatures.

Expert Solution
Summary Introduction

Introduction:

The temperature regulation in lizards was studied by Paul E. Hertz of Barnard College. The body temperature of lizards varies with the temperature of the environment. He and his colleagues demonstrated that lizards maintain homeostasis by perching in the sun and warming up. They move to shade if they feel hot. The researchers used null hypothesis to evaluate the observed data.

Explanation of Solution

Justification for the correct answer:

Option (c) is “they established null hypotheses about basking behavior and temperatures.” This option is correct as it was impossible to conduct a control experiment. To demonstrate that the lizards are not trying to regulate their body temperatures, he used copper lizards and hung them at random in Puerto Rico Island. The copper lizards helped in establishing the null hypothesis. Hence, option (c) is the correct answer.

Justifications for the incorrect answers:

Option (a) is “they attracted live lizards to the study site.” It is false as the copper lizard was not attracting the live lizards. Therefore, it is an incorrect option.

Option (b) is “they measured the temperatures of live lizards...

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Chapter 1 Solutions

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