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Question

Which of the following is a growth movement and which is not?
(a) folding up of leaves of sensitive plant on touching with hand.
(b) folding up of petals of dandelion flower when light fades.


Solution

Neither of them are growth movements. They are nastic movements.
(a) This is a thigmonastic movement.
(b) This is a photonastic movement.

Science
Lakhmir Biology 2013
Standard X

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