Briefly explain how the rate of transpiration is affected by:(a) Intensity of light (b) Humidity of the atmosphere

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Briefly explain how the rate of transpiration is affected by:(a) Intensity of light (b) Humidity of the atmosphere

Biology | Class 10 | ICSE | Selina | Transpiration

Briefly explain how the rate of transpiration is affected by:(a) Intensity of light (b) Humidity of the atmosphere

(a) Intensity of light:

During the day, the stomata is open to facilitate the internal CO₂ distribution of photosynthesis. At night it closes. Therefore, most transpiration occurs during the day. When it is cloudy during the day, the stomata are slowly closed and transpiration is reduced.

(b) Humidity of the atmosphere

Transpiration is reduced when the air outside is moist. High humidity in the air reduces the level of external distribution of internal water vapor across the stomata, thereby reducing transpiration rate.

i

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