Question

why does the leaflets of Mimosa pudica droop down when touched?

Answer 1

The leaflests of mimosa pudica droop down when whe touch beacoz when we touch the plant our touch act as a stimulus for the plant and in return some quick respone is realised in form of chemical from the stem . this chemical force lead the water to come out of the cell and due to loss of turgor pressur it close it leave .

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Answer 2

It's because wen we touch it the cells of the leaves loses its turgor pressure.