Chapter 31, Problem 2STP

Summary Introduction

Introduction:

Circadian rhythms are frequent shifts in the biology and actions of individuals occurring in 24-hour periods. The term circadian comes from a Latin word that means "about a day." Circadian rhythms exist in nearly every animal. In fact, it occurs in several living organisms

Answer to Problem 2STP

Correct answer:

The correct answer is Option (a) most activity during hours of darkness.

Explanation of Solution

Explanation/justification for the correct answer:

Option (a) According to the graph, most activities were done during hours of darkness.

Explanation for incorrect answer:

Option (b) the most activity was done during hours of daylight. According to the graph, most activities were done during hours of darkness. Thus, this cannot be the correct option.

Option(c) constant sleeping, the most activity was done during hours of darkness. Thus, this cannot be the correct answer.

Option (d) continuous activity, the most activity was done during hours of darkness. Thus, this cannot be the correct option.

Conclusion

The squirrels were exposed to 12 h of daylight each day displayed the most activity was done during hours of darkness behavior pattern during a 24-hr cycle. Hence, the correct answer is option (a).