Circadian rhythms are
A) annual changes in behavior (such as bird migration)
B) learned patterns of daily activity.
C) not found in plants.
D) endogenous cycles of activity over the course of a day.
E) monthly cycles of reproductive activity.

Question

Quizplus · Accepted Answer

Circadian rhythms are endogenous cycles of activity that occur over the course of a day, driven by an internal biological clock. They are found in many organisms, including humans and animals. These rhythms can affect various aspects of behavior and physiology, such as sleep-wake cycles, hormone production, metabolism, and gene expression.

Circadian Rhythms Are