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Question

Movements of tentacles in Drosera are


A
Photonastic
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B
Thermonastic
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C
Thigmonastic
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D
None of the above
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Solution

The correct option is B Thigmonastic
Nastic movements are responses of plant parts to stimuli. Photonastic movement is the nastic response of plant in response to light. Thermonastic movement is the a nastic response of plant in response to change in temperature. Seismonastic movement is the nastic response of a plant to touch or vibration. Dropping of leaves of Mimosa pudica upon touching is due to seismonasty. Thigmonastic movement is the nastic response of a plant to touch. The movements of tentacles of Drosera when comes in contact with insect is due to thigmonasty.
Thus, the correct answer is option C.

Biology

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