Garreau's potometer

Darwin's potometer helps to demonstrate the suction force created due to ___ .

There is unequal transpiration from the two surfaces of a dorsiventral leaf.

Potometers measure the water lost during transpiration.

Give suitable explanation for the following :

(a) A higher rate of transpiration is recorded on a windy day rather than on a calm day.

(b) Excessive transpiration results in the wilting of the leaves.

(c) Water transpired is the water absorbed.

(d) More transpiration occurs from the lower surface of a dorsiventral leaf.

(e) Cork and bark of trees help in preventing loss of water.

(f) Perspiration and transpiration help to cool the body temperature of the organism.

(g) On a bright sunny day, the leaves of certain plants roll up.