Closing cells are found in

Options

A. stomata
B. sieve
C. lenticels
D. wounded areas.

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks where closing cells are found. Closing cells refer to cells that are involved in the regulation of openings in plant structures.

2. **Identifying Closing Cells**: Closing cells are known as guard cells. These cells are responsible for the opening and closing of stomata, which are small openings on the surface of leaves.

3. **Location of Guard Cells**: Guard cells are located in the epidermis of leaves, specifically surrounding the stomata. They are modified epidermal cells that have a characteristic kidney or dumbbell shape.

4. **Function of Guard Cells**: The primary function of guard cells is to regulate gas exchange and transpiration in plants by opening and closing the stomata. They also contain chloroplasts, which allow them to perform photosynthesis.

5. **Evaluating the Options**:
- **Option 1: Stomata** - Correct, as guard cells are found here.
- **Option 2: Sieve** - Incorrect, as sieve cells are part of the phloem and do not function in closing.
- **Option 3: Lenticels** - Incorrect, as lenticels are involved in gas exchange but do not open and close like stomata.
- **Option 4: Wounded Areas** - Incorrect, as these areas do not contain closing cells.

6. **Conclusion**: The only correct answer is that closing cells (guard cells) are found in the stomata.

### Final Answer:
Closing cells are found in **stomata**.

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