Collenchyma is a

Options

A. photosynthetic tissue
B. water coducting tissue
C. living mechanical tissue
D. dead mechanical tissue

Answer

### Step-by-Step Solution:

1. **Definition of Collenchyma**: Collenchyma is a type of plant tissue that provides support, particularly in areas of growth.

2. **Characteristics of Collenchyma**:
- The cell walls of collenchyma cells are thickened at the corners due to the presence of cellulose.
- These cells are living, which distinguishes them from other types of mechanical tissues.

3. **Function of Collenchyma**:
- Collenchyma provides mechanical support to the growing parts of the plant, such as stems and petioles (the stalk that attaches a leaf to the stem).
- It helps the plant maintain its structure and resist bending.

4. **Comparison with Other Tissues**:
- **Photosynthetic Tissues**: These are primarily parenchyma cells that contain chlorophyll and are responsible for photosynthesis.
- **Water Conducting Tissues**: Xylem is responsible for transporting water from the roots to other parts of the plant.
- **Dead Mechanical Tissues**: Sclerenchyma is a type of mechanical tissue that is dead at maturity and provides support.

5. **Conclusion**: Based on the characteristics and functions of collenchyma, it is classified as a living mechanical tissue that supports the growing parts of the plant.

### Final Answer:
Collenchyma is a **living mechanical tissue**.

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