Describe the role of agrobacterium in transforming a plant cell.

Explanation

### Step-by-Step Solution:

1. **Introduction to Agrobacterium**:
- Agrobacterium is a genus of bacteria that plays a crucial role in plant genetic engineering. Specifically, Agrobacterium tumefaciens is the species most commonly used for transforming plant cells.

2. **Vector Functionality**:
- Agrobacterium acts as a vector, which means it is a carrier that can transfer genetic material into plant cells. This is essential for recombinant DNA technology, where scientists want to introduce new genes into plants.

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