Plant Growth And Development Question 25
Question: What is the action spectrum of photoperiodism [BHU 1982]
Options:
A) 430 and 660 nm
B) 640 and 660 nm
C) 660 and 730 nm
D) 700 and 900 nm
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Answer:
Correct Answer: C
Solution:
Because two types of phytochrome is present in plants i.e., P660 and P730.