Given below is an experimental set-up to study a particular process:

Name the process being studied.

Explanation

(i) Transpiration.
(ii) It is the loss of the water as water vapours from the aerial parts/stem, leaves of the plant.
(iii) To prevent evaporation of water from the soil.
(iv) An empty polythene bag with its mouth tied and kept in sunlight will show no droplets of water inside.
(v) Benefits of transpiration :
(a) Gives a cooling effect to the plant on hot days.
(b) Suction force is created for ascent of sap.