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

### Step-by-Step Solution

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

2. **Identifying Pollutants**: The primary pollutants mentioned are hydrocarbons, specifically aliphatic and aromatic hydrocarbons, which are significant contributors to environmental pollution.

3. **Bacterial Species Involved**: The transcript indicates that certain species of the genus *Pseudomonas* are involved in the degradation of hydrocarbons.

4. **Role of Catabolic Plasmids**: It is mentioned that many strains of *Pseudomonas* contain catabolic plasmids. These plasmids carry genes that enable the bacteria to degrade hydrocarbons effectively.

5. **Bioremediation Process**: The process by which these bacteria are used to clean up pollutants is known as bioremediation. The catabolic genes can be transferred between bacteria through horizontal gene transfer, creating "superbugs" that are efficient at degrading pollutants.

6. **Conclusion**: Based on the information provided, the genetically altered bacterium used in the control of environmental pollution is a species of *Pseudomonas*.

7. **Final Answer**: The correct answer is *Pseudomonas* species.