Cycles of biological activity that are repeated every 24 hours are called ____.
A) systemic acquired rhythms
B) tropisms
C) physiological requirements
D) circadian rhythms
E) photoperiods

Question

Cycles of biological activity that are repeated every 24 hours are called ____.  
A) systemic acquired rhythms
B) tropisms
C) physiological requirements
D) circadian rhythms
E) photoperiods

Quizplus · Accepted Answer

Circadian rhythms are biological cycles that repeat every 24 hours. These rhythms are important for regulating processes such as sleep-wake cycles, hormone production, and metabolism. Examples of circadian rhythms include the sleep-wake cycle and the release of cortisol from the adrenal gland.

Cycles of Biological Activity That Are Repeated Every 24 Hours