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Solution


Q.

Gibberellins promotes cell division and elongation in
 a) Leaves              b) Roots             c) Shoots            d) All of these
1 A
2 B
3 C
4 D

Ans.

(d) Gibberellins are growth hormones having gibbane ring structure, which causes cell elongation of intact plants. Thus, gibberellin promotes cell elongation in root, shoot and leaves of a plant.