What are special features of cell wall of collenchyma?

Explanation

### Step-by-Step Solution:

1. **Definition of Collenchyma**:
- Collenchyma is a type of simple permanent tissue in plants that provides support, particularly in growing regions.

2. **Structure of Cell Wall**:
- The cell wall of collenchyma is characterized by being **unevenly thickened**. This means that the thickness of the cell wall varies at different points.

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