The stomatal aperture, guard cells and the surrounding subsidiary cells are together called ________

Options

A. Trichome
B. Stomata
C. Stomatal apparatus
D. Ground tissue

Answer

To answer the question, "The stomatal aperture, guard cells and the surrounding subsidiary cells are together called ________," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Components**:
- Identify the components mentioned in the question: stomatal aperture, guard cells, and subsidiary cells.
- The stomatal aperture is the opening that allows gas exchange, while guard cells control this opening. Subsidiary cells are supportive cells surrounding the guard cells.

2. **Identifying the Correct Term**:
- The question asks for a collective term that encompasses all three components.
- The options provided are:
- Trichome
- Stomata
- Stomatal apparatus
- Ground tissue

3. **Analyzing the Options**:
- **Trichome**: This refers to hair-like structures on the plant surface, not related to the stomatal structure.
- **Stomata**: This term refers to the openings themselves but does not include the guard cells and subsidiary cells.
- **Stomatal apparatus**: This term includes the stomatal aperture, guard cells, and subsidiary cells, making it a suitable choice.
- **Ground tissue**: This refers to a type of plant tissue and does not relate to the stomatal structure.

4. **Choosing the Correct Answer**:
- Based on the analysis, the correct term that includes the stomatal aperture, guard cells, and subsidiary cells is **stomatal apparatus**.

### Final Answer:
The stomatal aperture, guard cells, and the surrounding subsidiary cells are together called **stomatal apparatus**.

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