Genetically altered bacterium used in the control of environment pollution is

Options

A. E. coli
B. Bacillus anthracis
C. Pseudomonas putida
D. Agrobacterium tumefaceins

Answer

To solve the question regarding the genetically altered bacterium used in the control of environmental pollution, we will analyze the options provided and identify the correct answer step by step.

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for a genetically altered bacterium that is used specifically for controlling environmental pollution.

2. **Evaluating the Options**:
- **E. coli**: This bacterium is primarily used in genetic engineering and molecular biology for cloning and protein production. It is not specifically known for environmental pollution control.
- **Bacillus anthracis**: This is the bacterium that causes anthrax and is known for its use as a biological weapon. It does not play a role in environmental pollution control.
- **Pseudomonas putida**: This bacterium is known for its ability to degrade various pollutants, including hydrocarbons and nitro-aromatic compounds. It contains catabolic plasmids that enable it to break down environmental pollutants effectively.
- **Agrobacterium tumefaciens**: This bacterium is primarily used in plant genetic engineering to transfer genes into plants. It is not associated with environmental pollution control.

3. **Identifying the Correct Answer**: Among the options, **Pseudomonas putida** stands out as the bacterium that is genetically altered and used in the control of environmental pollution due to its ability to degrade harmful substances.

4. **Conclusion**: The correct answer to the question is **Pseudomonas putida**.

### Final Answer:
**Pseudomonas putida**