A) enzymes
B) stomatas
C) phytochromes
D) phytohormones
Correct Answer: C
Solution :
Photoperiodism is a biological response to change in the ratioof light and dark periods in 24 hours cycle. It is regulated by the photo reversible pigment called phytochrome. Phytochrome is a photoreceptor chromoprotein.You need to login to perform this action.
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