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Q.

Which of the following physiological effects is caused by gibberellins in plants?

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a

Decrease the length of grape stalks. 

b

Improves the shape of apple.

c

Shortening of internodes 

d

Delaying seed production in conifers

answer is D.

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Detailed Solution

 Gibberellins produce a wide range of physiological responses in the plants. 

Their ability to cause an increase in length of axis is used to increase the length of grape stalks. Gibberellins cause fruits like apples to elongate and improve their shape. They also delay senescence.

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Which of the following physiological effects is caused by gibberellins in plants?