Question

Which of the following does not affect the rate of transpiration?

• A. Light
• B. Humidity
• C. Wind
• D. Age of Plant

Answer 1

The correct option is D

Age of Plant

The correct option is D.

Explanation for the correct option:

1. The internal factors that affect the rate of transpiration are area of leaf, structure of leaf, water content of leaf, orientation of leaf and succulence.
2. Although the age of plant is internal factor but it doesn't affect the rate of transpiration.

Explanation for the incorrect options:

Option A:

Light intensity regulates the amount of stomatal opening thus affecting the rate of transpiration.

Option B:

The lesser the Humidity in the air, The more will be the transpiration. Thus, Humidity of air also affects the rate of transpiration.

Option C:

The more the speed of wind flow, the more will be the transpiration. Thus, the speed of the wind also affects the rate of transpiration.

Final answer: Age of plant does not affect the rate of transpiration.