Which statement is TRUE with regard to 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)It rarely varies from one individual to another, if at all.
D)It is highly consistent in a given individual in a given environment.

Question

Which statement is TRUE with regard to 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)​It rarely varies from one individual to another, if at all.
D)It is highly consistent in a given individual in a given environment.

Quizplus · Accepted Answer

The statement that best describes the duration of a self-generated sleep/activity cycle is that it is highly consistent in a given individual in a given environment. The cycle is known as the circadian rhythm and it typically lasts around 24 hours. It is highly dependent on environmental cues, such as light and darkness, and can be disrupted with changes in these cues. While there may be some individual variation in the exact length of the cycle, it is generally consistent within an individual.

Which Statement Is TRUE with Regard to the Duration of a Self-Generated