Question

Transpiration is best defined as

(a) loss of water by the plant.

(b) evaporation of water from the aerial surfaces of a plant.

(c) loss of water, as water vapour, by a plant.

(d) release of water by a plant into the atmosphere.

Answer 1

(b) evaporation of water from the aerial surfaces of a plant.

This process of elimination of excess water from the plant body is known as transpiration. It is generally the evaporation of water from the surface of the leaves. During the process of transpiration, water molecules in the plant tissues are removed from the aerial parts of the plants.

Figure : Transpiration