Explain the role of Ti plasmids in biotechnology.

Explanation

### Step-by-Step Solution:

1. **Definition of TI Plasmids**:
- TI plasmids, or Tumor Inducing plasmids, are specific plasmids found in *Agrobacterium tumefaciens*, a bacterium that acts as a plant pathogen.

2. **Pathogenic Role**:
- These plasmids are responsible for the ability of *Agrobacterium tumefaciens* to induce tumors in plants. The plasmid carries genes that facilitate the infection process and the subsequent formation of tumors in the host plant.

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