Question

Of the processes which occur in leaves, the one which may lower their temperature is

• A. Respiration
• B. Photosynthesis
• C. Transpiration
• D. Hydrolysis

Answer 1

The correct option is C

Transpiration

The correct option is C:

Explanation of the correct option:

1. Transpiration is the process of loss of water in the form of water vapor from the surface of aerial parts of plants.
2. Almost 99 percent of water is lost, whereas the rest 1 percent is used for the process of photosynthesis.
3. It is a very important process since it keeps the leaf surface cool due to evaporative cooling.

Explanation of the incorrect options:

Option B:

Respiration is the process of breakdown of glucose with the help of oxygen and releases carbon dioxide.

Option C:

Photosynthesis is the process of the formation of food by plants with the help of sunlight, carbon dioxide, water, and chlorophyll.

Option D:

Hydrolysis is the breakdown of complex molecules in an aqueous medium.

Final answer: Transpiration lowers the temperature of the leaves.