Question

Effect of day length duration on plant development/flowering is

• A. Chemotropism
• B. Phototropism
• C. Photoperiodism
• D. Photonasty

Answer 1

The correct option is C Photoperiodism

Photoperiodism is the phenomenon in which various physiological reactions like plant development and flowering are affected by the relative length of day or night periods. Phototropism is a growth movement by plant part in the direction of the light. Chemotropism is a growth movement by plant part in response to the chemical. Photonasty is the movements of plant parts to light.

Thus, the correct answer is option C.