Name the plasmid present in Agrobacterium tumefaciens.

Explanation

**Step-by-Step Solution:**

1. **Understanding Agrobacterium tumefaciens**:
- Agrobacterium tumefaciens is a soil bacterium known for its ability to infect plants.
- It is particularly famous for causing a plant disease known as crown gall disease.

2. **Identifying the Plasmid**:
- The key feature of Agrobacterium tumefaciens is its plasmid, which plays a crucial role in its pathogenicity.
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