Living cells showing mechanical function

Options

A. Sclerenchyma
B. Stone cells
C. Aerenchyma
D. Collenchyma

Answer

To solve the question "Living cells showing mechanical function," we will analyze each option provided and determine which one meets the criteria of being living and providing mechanical support.

### Step-by-Step Solution:

1. **Understand the Question**: We need to identify a type of cell or tissue that is both living and provides mechanical support.

2. **Evaluate the Options**:
- **Option 1: Sclerenchyma**
- Sclerenchyma is a type of simple permanent tissue.
- It is composed of dead cells.
- **Conclusion**: This option is incorrect because the cells are not living.

- **Option 2: Stone Cells**
- Stone cells are a specific type of sclerenchyma.
- Like sclerenchyma, stone cells are also made up of dead cells.
- **Conclusion**: This option is incorrect for the same reason as sclerenchyma.

- **Option 3: Erenchyma**
- Erenchyma is made up of living cells.
- However, its primary function is not mechanical support; it is mainly involved in gas exchange.
- **Conclusion**: This option is incorrect because it does not provide mechanical support.

- **Option 4: Cholenchyma**
- Cholenchyma is a type of simple permanent tissue.
- It is composed of living cells.
- Its main function is to provide mechanical support and flexibility to the plant.
- **Conclusion**: This option is correct as it meets both criteria of being living and providing mechanical support.

3. **Final Answer**: The correct answer is **Cholenchyma**.