BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
BIOLOGY:THE ESSENTIALS (LL) W/CONNECT
3rd Edition
ISBN: 9781260670929
Author: Hoefnagels
Publisher: MCG CUSTOM
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Chapter 28, Problem 1MCQ

Which of the following animals uses the most energy per gram of body weight?

a. Horse
b Eagle
c. Mouse
d Python
Expert Solution & Answer
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Summary Introduction

Introduction:

The energy requirement of an animal depends on the metabolic rate of the animal. Metabolic rate is controlled by factors like the ability to regulate body temperature, the size of the body and the physiological state.

Answer to Problem 1MCQ

Correct answer:

The animal that uses the most energy per gram body weight is a mouse. Hence, the correct answer is option c.

Explanation of Solution

Reason for correct answer:

Option c. is given as “Mouse.”

The mouse has a higher surface area relative to its body mass. As a result, the mouse will lose heat rapidly to the environment, using more energy per gram body weight. Hence, option c. is correct.

Reason for incorrect answer:

Option a. is given as, “Horse.”

The horse has a lower surface area relative to body mass. Hence it loses less heat as compared to a mouse making it consume less energy per gram body weight. Hence, option a. is incorrect.

Option b. is given as, “Eagle.”

As compared to the mouse, the eagle has a lower surface area relative to body mass. Hence it loses less and consumes less energy per gram body weight as compared to a mouse. Hence, option b. is incorrect.

Option d. is given as, “Python.”

As compared to the mouse, python has a large surface area and more weight. Hence it has a lower surface area relative to body mass. Hence it uses less energy per gram body weight as compared to a mouse. Hence, option d. is incorrect.

Hence, the options a., b., and d. are incorrect.

Conclusion

Mouse is small in size has a higher surface to body weight ratio and hence uses most energy per gram body weight. Thus, the correct option is c.

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BIOLOGY:THE ESSENTIALS (LL) W/CONNECT

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