Name the plant hormone associated with apical dominance.

Auxin

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Ethylene

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Cytokinin

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None of the above

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Solution

The correct option is A Auxin
Apical dominance is a phenomenon wherby, the inhibition of the growth of lateral buds occurs due to the terminal bud of a shoot.
It is caused by the production of IAA (auxin) in abundance by the apical bud.
This auxin is transported basipetally from the apical bud.
The auxin causes the lateral buds to remain dormant.

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Auxin induces apical dominance which is supression of apical buds.

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