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Question

____________ hormone helps in lateral shoot growth.

A
Auxin
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B
Cytokinin
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C
IAA
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D
Abscisic acid
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Solution

The correct option is B Cytokinin
Cytokinin helps in lateral shoot growth. It is a plant growth promoter that controls apical dominance. Apical dominance is a phenomenon in which the growth of the main central stem of the plant is more as compared to the other stems.
Cytokinins act as antagonistic to auxins. They help to regulate axillary bud growth and control apical dominance. When auxin is used they inhibit the axillary bud growth and restrict lateral branching. But cytokinin helps in the growth of axillary bud and a plant becomes bushy.

IAA (Indole-3-acetic acid) are naturally occurring auxins. Auxins promote apical dominance.
Abscisic acid is a plant growth inhibitor. It inhibits metabolism in plants.

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