What are ‘circadian rhythms’?

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What are ‘circadian rhythms’?

Daily responses of animals to light conditions
Growth of plant tip with changing light direction
Annual responses of living organisms to light conditions
Daily responses of animals to water availability
This question was previously asked in
UPSC Geoscientist – 2023
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Circadian rhythms are daily responses of animals to light conditions.
Circadian rhythms are endogenous biological rhythms that oscillate with a period of approximately 24 hours. They are synchronized by environmental cues, most notably light and dark cycles, and govern various physiological processes and behaviors in living organisms, including sleep-wake cycles, feeding patterns, and hormone release. They represent adaptations to the Earth’s daily cycle of light and darkness.
While primarily synchronized by light, other cues like temperature, social interaction, and food availability can also influence circadian rhythms. These rhythms are fundamental to chronobiology and are found across diverse life forms, from bacteria to humans.

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