A) Chlorophyll synthesis begins.
B) The rate of shoot elongation increases.
C) The hypocotyl hook straightens (in species with a hypocotyl hook).
D) Phytochrome \[{{\operatorname{P}}_{r}}\] is converted to\[{{\operatorname{P}}_{fr}}\].
Correct Answer: C
Solution :
[b] The rate of shoot elongation is greatest when the seedling is in the dark, and decreases upon exposure to light.
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