Question

what is photoperiods how it is used

Answer 1

the interval in a 24-hour period during which a plant or animal is exposed to light.

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Answer 2

Answer:

Photoperiodism is the ability of plants and animals to measure environmental day length (photoperiod), typically by monitoring night length. This process underlies a biological calendar. Photoperiod is inversely correlated to the nightly duration of melatonin secretion in animals.