What Happens to Phytochromes After Several Days of Dark, Rainy

question 5

Multiple Choice

What happens to phytochromes after several days of dark, rainy weather?

• A) Pr absorbs darkness and converts to Pfr.
• B) Pr stimulates flowering.
• C) Pr and Pfr become unstable and both are destroyed.
• D) Pr and Pfr are both formed from inactive phytochrome.
• E) Pfr spontaneously reverts to Pr.

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