At night, assuming no artificial lights, primarily

a. Pr absorbs red light and is converted to Pfr.
b. Pr absorbs far-red light and is converted to Pfr.
c. Pfr absorbs red light and is converted to Pr.
d. Pfr absorbs far-red light and is converted to Pr.
e. Pfr is converted to Pr.


E

Biology & Microbiology

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