A) photoperiodism
B) phototropism
C) photosynthesis
D) photolysis
Correct Answer: A
Solution :
The effect of photoperiods or daily duration of light hours and dark periods on the growth and development of plants, especially flowering, is called photoperiodism. The phenomenon of photoperiodism was first discovered by Garner and Allard (1920,1922). Depending upon the duration of photoperiod plants have been divided into following- [a] Short day plants [b] Long day plants [c] Day neutral plants [d] Intermediate plants
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