Question

1. define circadian rhythms. provide two examples of circadian rhythms.

Explanation:

Circadian rhythms are internal biological processes that regulate the sleep - wake cycle and other physiological activities over a 24 - hour period. One example is the sleep - wake cycle, where humans typically sleep at night and are awake during the day. Another example is the body temperature rhythm, which shows a natural fluctuation over 24 hours, being lower during sleep and higher during wakefulness.

Answer:

Circadian rhythms are 24 - hour internal biological cycles. Examples: sleep - wake cycle, body temperature rhythm.