Plant-Growth-And-Development Question 254

Question: Which of the following does not normally occur when an etiolated seedling is exposed to light?

Options:

A) Chlorophyll synthesis begins.

B) The rate of shoot elongation increases.

C) The hypocotyl hook straightens (in species with a hypocotyl hook).

D) Phytochrome $ {P_{r}} $ is converted to $ {P_{fr}} $ .

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Answer:

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.