What happens to phytochromes after several days of dark, rainy weather?
A) Pr and Pfr become unstable and both are destroyed.
B) Pr absorbs darkness and converts to Pfr.
C) Pr and Pfr are both formed from inactive phytochrome.
D) Pr stimulates flowering.
E) Pfr spontaneously reverts to Pr.
Correct Answer:
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