Question

the plant drop down in evening during a sunny day give reason​

Answer 1

Answer:

Prolonged hot sun and dry soil are the primary, but not the only, causes of wilting. Leaves are likely to droop more when air is dry as well as hot. High humidity on a hot summer day can reduce the quantity of water from roots needed by leaves. Wind can increase water needs and cause more drooping.

Answer 2

Answer:

because they response to stimuli and also during day time the leaves are busy taking CO2.

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