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An adaptation to reduce transpiration is...

An adaptation to reduce transpiration is
(a) Spongy parenchyma
(b) Sunken stomata
(c) Hydathodes
(d) Aerenchyma

A

Spongy perenchyma

B

sunken stomata

C

Hydathodes

D

Aeremchyma

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding which adaptation reduces transpiration in plants, we can analyze each option provided: 1. **Understanding Transpiration**: - Transpiration is the process by which water vapor is lost from the aerial parts of the plant, primarily through small openings called stomata. 2. **Evaluating Each Option**: - **(a) Spongy parenchyma**: - This type of tissue is loosely packed and is primarily involved in gas exchange and storage. It does not specifically help in reducing transpiration. - **Conclusion**: Incorrect. - **(b) Sunken stomata**: - Sunken stomata are located in depressions on the leaf surface, which helps trap moist air around the stomata. This reduces the concentration gradient between the inside of the leaf and the outside environment, thereby decreasing the rate of water vapor diffusion and reducing transpiration. - **Conclusion**: Correct. - **(c) Hydathodes**: - Hydathodes are specialized structures that help in the secretion of water (guttation) rather than reducing water loss. They are not adaptations to minimize transpiration. - **Conclusion**: Incorrect. - **(d) Aerenchyma**: - Aerenchyma is a type of parenchyma tissue that contains large air spaces and is typically found in aquatic plants. It facilitates gas exchange but does not play a role in reducing transpiration. - **Conclusion**: Incorrect. 3. **Final Answer**: - The adaptation that reduces transpiration is **(b) Sunken stomata**.
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