In stomata guard cells are

Options

A. special types of epidermal cells
B. special types of mesophyll cells
C. special types of palisade cells
D. special types of spongy cells

Answer

To answer the question "In stomata, guard cells are:", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Guard Cells**:
- Guard cells are specialized cells that surround the stomata (the pores on the leaf surface).
- They are responsible for regulating the opening and closing of the stomata.

2. **Identifying the Type of Cells**:
- The options provided are:
- Special type of epidermal cells
- Special type of mesophyll cells
- Special type of palisade cells
- Special type of spongy cells

3. **Analyzing the Function of Guard Cells**:
- Guard cells are involved in gas exchange (oxygen and carbon dioxide) and transpiration (loss of water vapor).
- They also contain chloroplasts, which are essential for photosynthesis.

4. **Determining the Correct Option**:
- Since guard cells are found in the epidermis of leaves and play a crucial role in regulating stomatal function, they are classified as **special type of epidermal cells**.
- The other options (mesophyll, palisade, and spongy cells) do not accurately describe guard cells.

5. **Conclusion**:
- The correct answer is that guard cells are **special type of epidermal cells**.

### Final Answer:
Guard cells in stomata are special type of epidermal cells.

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