Which hormone is responsible for apical growth?

IAA

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Abscisic acid

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All of the above

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Solution

The correct option is A IAA
Apical dominance is a phenomenon in which central stem is dominant and lateral stems are suppressed. It is due to plant hormone auxin produced in the tip of the shoot. IAA (indoleacetic acid), an auxin hormone is responsible for apical dominance and cytokinin hormone is responsible for breaking the apical dominance.
Thus, the correct answer is 'IAA'.

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