Chrysanthemums and other short-day plants flower only when the hours of darkness are greater than a critical value. This is an example of ____.

Question

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This is an example of photoperiodism, which is the physiological reaction of organisms to the length of day or night. In this case, chrysanthemums and other short-day plants require a longer period of darkness than a specific critical value to initiate flowering.

Chrysanthemums and Other Short-Day Plants Flower Only When the Hours