Mention the type of host cells suitable for the gene guns to introduce an alien DNA.

Explanation

### Step-by-Step Solution:

1. **Understanding Gene Gun Technology**:
- The gene gun method is a physical technique used to introduce foreign DNA into host cells. It is particularly useful for plant cells that have a rigid cell wall.

2. **Identifying Suitable Host Cells**:
- The most suitable host cells for the gene gun method are **undifferentiated plant cells**. These cells are typically in a state where they have not yet developed into specialized cells.

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