Why are plants obtained by protoplast culture called somatic hybrids?

Explanation

### Step-by-Step Solution:

1. **Understanding Protoplast Culture**:
- Protoplast culture involves the isolation of protoplasts, which are plant cells without their cell walls. This is achieved by digesting the cell wall using enzymes.

2. **Isolation of Protoplasts**:
- The first step in protoplast culture is to digest the cell wall of plant cells to isolate the protoplasts. This allows the cellular contents to be accessed and manipulated.

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