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Auxins

Auxin induces...

Question

Auxin induces apical dominance which is supression of apical buds.

A

IAA

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B

GA

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Solution

The correct option is B
GA

Auxin is responsible for apical dominance in plants. Apical dominance is the supression of growth of lateral buds. This promotes the growth of apical buds.

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Apical dominance phenomenon is caused by :

(a) auxins (b) GA

(c) cytokinins (d) ABA

Auxin induces apical dominance which is supression of apical buds.

Q. Assertion :Suppression of growth of auxillary buds is called apical dominance. Reason: It is due to effect of downward movement of Auxin from apical region towards the lower side.

Q. Assertion : Auxins promote apical dominance by suppressing the activity of lateral buds.
Reason: In moriculture, periodic pruning of shoot tips is done to make Mulberry plants bushy.

Q. I. Assertion: The presence of apical bud inhibits the growth of lateral bud, this is called apical dominance.
II. Reason: Auxin is responsible for apical dominance.

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