In submerged plants, the stomata lie on

Options

A. upper surface
B. lower surface
C. not on any surface
D. equally on both surfaces

Answer

### Step-by-Step Solution:

1. **Understanding Submerged Plants**:
- Submerged plants are those that grow entirely underwater. Examples include certain types of algae and aquatic plants.

2. **Types of Submerged Plants**:
- There are two categories:
- **Completely submerged plants**: These plants are entirely under the water surface and do not have any part above the water.
- **Partially submerged plants**: These plants have parts, such as leaves, that extend above the water surface (e.g., lotus and Valisneria).

3. **Stomata in Completely Submerged Plants**:
- Completely submerged plants do not possess stomata. This is because they rely on the surrounding water to absorb necessary gases (like oxygen and carbon dioxide) that are dissolved in it.

4. **Stomata in Partially Submerged Plants**:
- For plants that have leaves above the water surface, stomata are present. These stomata are located on the upper surface of the leaves. This positioning allows them to effectively exchange gases with the atmosphere.

5. **Conclusion**:
- If the question specifies "completely submerged plants," the answer is that they do not have stomata. However, if it refers to submerged plants in general without specifying, and the options include "upper surface," that would be the correct answer for those plants that have parts above the water.

### Final Answer:
In submerged plants, the stomata lie on the **upper surface** of the leaves (for partially submerged plants).

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