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Question

Arrange the following activities in the order of the speed (fastest to slowest) in which they take place.
(i)   Movement of mimosa when it is touched.
(ii)  Movement of sunflower in response to day and night.
(iii) Growth – related movements of plants.



A

(ii) – (iii) – (i)

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B

(i) – (ii) – (iii)

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C

(iii) – (ii) - (i)

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D

 (iii) – (i) – (ii)

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Solution

The correct option is B

(i) – (ii) – (iii)


The leaves of a mimosa plant close and droop down immediately after they are touched (thigmotropic movements). Movement of sunflower in response to day and night happens much slowly (phototropic movement). Growth related movements take place even slowly.


Biology

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