A) photoperiodism
B) phototropism
C) nyctinasty
D) seismonasty
E) None of these
Correct Answer: A
Solution :
Photoperiodism is a biological response to changes in the ratio of light and dark in a 24 hour cycle. It is a light stimulus shown by above ground part of a plant. The movement in stimulus of light or dark is known as nastic movement and this phenomenon is known as nyctinasty.You need to login to perform this action.
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