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.

Question

Quizplus · Accepted Answer

The duration of a self-generated sleep/activity cycle is highly consistent in a given individual in a given environment. This is known as the circadian rhythm, which is a biological process that is regulated by internal factors and external cues such as light and dark cycles. While there may be slight variations in the circadian rhythm between individuals, it is generally considered to be a stable and predictable cycle for a given organism.

Which of the Following Is TRUE Concerning the Duration of a Self-Generated