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 characteristic features of collenchyma, we will analyze each option provided in the question and identify which one does not belong to collenchyma.

### Step-by-Step Solution:

1. **Understanding Collenchyma**:
- Collenchyma is a type of plant tissue that provides support and flexibility to the plant. It is primarily found in young stems and leaf petioles.

2. **Analyzing the Options**:
- **Option 1: They possess thickened cell walls**.
- This is true. Collenchyma cells have thickened corners of their cell walls, which provide structural support.

- **Option 2: They are dead at maturity**.
- This is false. Collenchyma cells are alive at maturity. This characteristic is actually associated with sclerenchyma, which consists of dead cells at maturity.

- **Option 3: They possess vacuoles for the storage of food**.
- This is true. Collenchyma cells do contain vacuoles that can store nutrients and other substances.

- **Option 4: Their cell walls contain cellulose, pectin, and hemicellulose**.
- This is also true. The cell walls of collenchyma are made up of cellulose, pectin, and hemicellulose, contributing to their strength and flexibility.

3. **Conclusion**:
- The only statement that does not describe a characteristic feature of collenchyma is **Option 2: They are dead at maturity**. Therefore, the correct answer to the question is Option 2.

### Final Answer:
**Option 2: They are dead at maturity.**