Collenchyma shows all of the following characteristic features , except

Options

A. They possess thickened cell wall
B. They are dead at maturity
C. They possess vacuoles, for storage of food
D. They have cell wall which contains cellulose, pectin and hemicellulose

Answer

To solve the question regarding the characteristics of collenchyma, we will analyze each option provided and determine which one does not align with the known features of collenchyma.

### Step-by-Step Solution:

1. **Understanding Collenchyma**:
- Collenchyma is a type of permanent tissue in plants. It is primarily involved in providing mechanical support and flexibility to the plant structure.

2. **Identifying the Characteristics of Collenchyma**:
- Collenchyma cells are known for their **unequally thickened cell walls**. The walls are thicker at the corners where the cells meet and thinner in the middle.
- The cells of collenchyma are **living at maturity**. This is a key characteristic that distinguishes them from sclerenchyma, which consists of dead cells.
- Collenchyma cells contain **vacuoles** that are involved in the storage of nutrients and other substances.
- The cell walls of collenchyma are composed of **cellulose, pectin, and hemicellulose**.

3. **Analyzing Each Option**:
- **Option 1**: Unequally thickened cell walls - This is a characteristic feature of collenchyma.
- **Option 2**: Cells are dead at maturity - This is **not true** for collenchyma as its cells are living at maturity.
- **Option 3**: Possess vacuoles for storage of food - This is a characteristic feature of collenchyma.
- **Option 4**: Cell wall contains cellulose, pectin, and hemicellulose - This is also a characteristic feature of collenchyma.

4. **Conclusion**:
- The only statement that does not accurately describe collenchyma is that the cells are dead at maturity. Therefore, this is the correct answer to the question.

### Final Answer:
**Collenchyma shows all of the following characteristic features, except: Cells are dead at maturity.**

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