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Q.

Which hormone has a role in apical hook formation in dicot seedlings ?

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a

Auxins 

b

Gibberellins 

c

Cytokinins 

d

Ethylene 

answer is D.

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Detailed Solution

NCERT Page no: 250

Ethylene is a simple gaseous PGR. It is synthesised in large amounts by tissues undergoing senescence and ripening fruits. Influences of ethylene on plants include horizontal growth of seedlings, swelling of the axis and apical hook formation in dicot seedlings.

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