Stomatal apparatus consists of

Options

A. 1)Stomatal pore
B. 2)Guard cells
C. 3)Subsidiary cells
D. 4)All of these

Answer

### Step-by-Step Solution:

1. **Understanding Stomata**:
- Stomata are small pores located on the epidermis of leaves.
- Their primary functions include facilitating transpiration (the process of water vapor loss) and allowing gas exchange (such as oxygen and carbon dioxide) in plants.

2. **Components of Stomatal Apparatus**:
- The stomatal apparatus consists of:
- **Stomatal Pore**: The actual opening that allows for gas exchange.
- **Guard Cells**: These are two bean-shaped cells that surround the stomatal pore. They control the opening and closing of the stomata, thereby regulating gas exchange and transpiration.
- **Subsidiary Cells**: Also known as accessory cells, these cells surround the guard cells and support their function.

3. **Identifying the Correct Option**:
- Given the components of the stomatal apparatus (stomatal pore, guard cells, and subsidiary cells), we can conclude that the stomatal apparatus consists of all these parts.
- Therefore, the correct answer from the options provided is **"all of these"**.

### Final Answer:
The stomatal apparatus consists of stomatal pore, guard cells, and subsidiary cells. Hence, the correct option is **4. All of these**.

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