Fill in the following blanks :
(d) Plant roots grow downward in response to

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Solution

The correct answer is: gravity.
The downward growth of roots due to the pull of gravity is positive geotropism.

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(a) A plant's response to light is called .................

(b) A plant's response to gravity is called .................

(d) Plant roots grow downward in response to .............

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A. Maximum growth is observed in ...............phase.

B. Apical dominance is due to ................

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