Tumor inducing plasmid transforms

Options

A. Nematodes
B. Bacteria
C. Fungi
D. Several dicot plants

Answer

**Step-by-Step Solution:**

1. **Understanding the Tumor Inducing Plasmid**: The question refers to a tumor-inducing plasmid, which is a specific type of plasmid that can cause tumors in plants. The most well-known example is the Ti (tumor-inducing) plasmid.

2. **Identifying the Tumor**: The crown gall tumor is a type of tumor that affects several dicot plants. It is caused by the bacterium Agrobacterium tumefaciens, which transfers the Ti plasmid into the plant cells.

3. **Role of Agrobacterium**: Agrobacterium tumefaciens is a soil bacterium that is capable of transferring its Ti plasmid into the cells of susceptible plants, leading to the formation of crown gall tumors.

4. **Target Plants**: The Ti plasmid is specifically used to transform dicot plants, which are a group of flowering plants that have two seed leaves (cotyledons). Examples include beans, tomatoes, and roses.

5. **Options Analysis**: The question provides options: nematodes, bacteria, and fungi. Since the crown gall tumor specifically affects dicot plants and not the other organisms listed, we can conclude that the Ti plasmid is not used to transform nematodes, bacteria, or fungi.

6. **Final Answer**: Therefore, the correct answer to the question "Tumor inducing plasmid transforms" is "several dicot plants."

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