Question

Transpiration decreases with the

• A. closing of stomata
• B. opening of stomata
• C. availability of water
• D. high temperature

Answer 1

The correct option is A

closing of stomata

The correct option is A.

Explanation of the Correct Option:

• Transpiration is when water is evaporated from aerial parts of the plant like leaves, stems etc.
• The degree of transpiration depends on the absorption of water from the roots.
• If roots absorb less water, the process of photosynthesis decreases and consequently, the exchange of gases, i.e., oxygen and carbon dioxide, starts to decrease, and stomata begin to close.

Explanation of the incorrect options:

Option B:

• Opening of stomata due to high turgor pressure in guard cells causes the exchange of oxygen and carbon dioxide gases between plants and the environment.

Option C:

• Water is a very important component of photosynthesis.

Option D:

• At high temperatures, transpiration increases as stomata releases more water vapor.

Therefore, Stomata is an important structural component of plants whose closing decreases transpiration.