Multiple Choice
Which of the following is TRUE concerning the duration of a self-generated sleep/activity cycle?
A) It is unreliable in most species, and dependably close to 24 hours only in primates.
B) It is longer if the organism is normally active in the dark.
C) There is little or no variability from one individual to another.
D) It is highly consistent in a given individual in a given environment.
Correct Answer:

Verified
Correct Answer:
Verified
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