Photoperiodism is substituted by

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(A) Photoperiodism refers to the physiological reaction of organisms to the length of day or night. In many plants, the requirement for a specific pho

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Temperature

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(A) Photoperiodism refers to the physiological reaction of organisms to the length of day or night. In many plants, the requirement for a specific photoperiod to induce flowering can be replaced or substituted by exposure to low temperatures, a process known as $Vernalization$. Therefore, temperature is the factor that can substitute for the photoperiodic requirement in these plants.

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