Give the occurrence of cell wall.

Explanation

### Step-by-Step Solution:

1. **Definition of Cell Wall**:
- The cell wall is a non-living rigid structure that surrounds the plasma membrane (or cell membrane) of certain cells. It provides support and protection to the cell.

2. **Occurrence of Cell Wall**:
- The cell wall is found in various organisms. Specifically, it occurs in:
- **Bacteria**: The cell wall is an essential component of bacterial cells, providing shape and protection.
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