Question

Choose the correct answer from the alternatives given.
A physiological response to the duration of light and darkness is a:

• A. daily phase cycle
• B. circadian rhythm
• C. biological clock
• D. photoperiodism

Answer 1

The correct option is D photoperiodism

Photoperiodism is the physiological reaction of organisms to the length of day or night. It occurs in plants and animals.

So, the correct option is 'Photoperiodism'.