Question

Q.2) On a hot summer day the leaves of a plant drop down because ______



(A) The plant becomes weak.

(B) Excessive transpiration takes place.

(C) Excessive photosynthesis takes place.

(D) No transpiration occurs.​

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.

Answer 2

Answer:

(B) Excessive transpiration takes place