+**Photoperiodism** is the physiological response of an organism to the length of day or night. This biological timekeeping mechanism orchestrates crucial life events, from [Flowering](/wiki/flowering) in plants to breeding cycles and [Migration](/wiki/migration) in animals, attuned to the subtle shifts of the sun's arc. It allows life to anticipate and adapt to seasonal changes.
+## See also
+- [Circadian Rhythm](/wiki/circadian_rhythm)
+- [Biological Clock](/wiki/biological_clock)
+- [Dormancy](/wiki/dormancy)
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