Q.

Just prior to the reproductive phase, internodes elongate enormously causing a marked increase in stem height. This phenomenon is known as

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a

photoperiodism

b

vernalization

c

bolting

d

phototropism

answer is C.

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Detailed Solution

Gibberellins promotes bolting (internode elongation just prior to flowering) in beet, cabbages and many plants with rosette habit.

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