Stomatal apparatus consists of

Options

A. Guard cells only
B. Subsidiary cells only
C. Stomatal pore only
D. All the above

Answer

**Step-by-Step Solution:**

1. **Understanding Stomatal Apparatus**: The stomatal apparatus is a crucial structure in plants that facilitates gas exchange. It primarily allows the exchange of carbon dioxide (CO2) and oxygen (O2) between the plant and its environment.

2. **Components of Stomatal Apparatus**: The stomatal apparatus consists of several key components:
- **Guard Cells**: These are specialized cells that form a pair around the stomatal pore. They are responsible for regulating the opening and closing of the stomata, thus controlling gas exchange and water loss.
- **Stomatal Pore**: This is the opening created between the guard cells. It is the actual site through which gases enter and exit the plant.
- **Subsidiary Cells**: These are the cells surrounding the guard cells and the stomatal pore. They provide support and help in the functioning of the guard cells.

3. **Conclusion**: Therefore, the stomatal apparatus consists of:
- A pair of guard cells
- A stomatal pore
- Subsidiary cells

4. **Final Answer**: The stomatal apparatus consists of guard cells, stomatal pore, and subsidiary cells.

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