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Question

Which one of the following hormones causes dwarf bean plants to grow tall?


A

Auxin

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B

Gibberellin

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C

Cytokinin

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D

Ethylene

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Solution

The correct option is B

Gibberellin


Gibberellins are growth hormones that stimulate cell elongation and cause plants to grow taller. So, if dwarf beans are treated with a dose of gibberellins, they can grow to the same height as the tall varieties.


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