Apical dominance in plants is caused by:

High concentration of auxins in the terminal bud

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High concentration of gibberellins in the apical bud

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High concentration of auxins in the lateral bud

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Absence of auxins and gibberellins in apical bud

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Solution

The correct option is A High concentration of auxins in the terminal bud
High concentrations of auxin in the shoot tips result in apical dominance. Apical dominance is defined as the growth of the plant in length and no axillary growth. This is promoted by auxin present in the shoot tips.

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