Non metabolical mechanical tissue is

Options

A. Collenchyma
B. Xylem
C. Sclerenchyma
D. Parenchyma

Answer

To answer the question "Non-metabolical mechanical tissue is," we need to evaluate the options provided: collenchyma, xylem, sclerenchyma, and parenchyma.

### Step-by-Step Solution:

1. **Understand the Types of Tissues**:
- Tissues in plants can be classified based on their functions. Mechanical tissues provide support and structure, while metabolic tissues are involved in various biochemical processes.

2. **Evaluate Collenchyma**:
- Collenchyma is a type of mechanical tissue that provides support, especially in young stems and leaves. However, it is also metabolically active, meaning it has metabolic functions.
- **Conclusion**: Collenchyma is not the correct answer because it is metabolically active.

3. **Evaluate Xylem**:
- Xylem is primarily a conducting tissue responsible for the transport of water and minerals from the roots to the rest of the plant. While it does provide some support, it is not classified as a purely mechanical tissue.
- **Conclusion**: Xylem is not the correct answer as it is a conducting tissue.

4. **Evaluate Parenchyma**:
- Parenchyma is a type of tissue that is involved in storage, photosynthesis, and tissue repair. It is not primarily a mechanical tissue and is metabolically active.
- **Conclusion**: Parenchyma is not the correct answer as it is involved in metabolic processes.

5. **Evaluate Sclerenchyma**:
- Sclerenchyma is a type of mechanical tissue that provides rigidity and strength to the plant. It is composed of dead cells that do not carry out metabolic functions, making it a non-metabolical mechanical tissue.
- **Conclusion**: Sclerenchyma is the correct answer as it is a non-metabolical mechanical tissue.

### Final Answer:
The non-metabolical mechanical tissue is **sclerenchyma**.