An outline sketch of a tree is shown in the diagram below. Study the same and answer the question that follo:

Explain the role of any three external factors that will increase the rate of this phenomenon.

Explanation

Three factors that will increase the rate of transpiration are:
a. Wind velocity: On a windy day, the rate of transpiration increases because of moving wind which removes the water vapours from around the leaves.
b. Relative humidity: Increase in relative humidity, decreases the rate of transpiration.
c. Light intensity : In bright light, the rate of transpiration increases as the stomata opens.