A genetically engineered bacteria used for clearing oil spills is:

Options

A. Escherischia coli
B. Bacillus subtilis
C. Agrobacterium tumefaciens
D. Pseudomonas putida

Answer

To solve the question about which genetically engineered bacteria is used for clearing oil spills, we can follow these steps:

### Step 1: Understand the Question
The question asks for a specific type of genetically engineered bacteria that is utilized for the purpose of cleaning up oil spills.

### Step 2: Analyze the Options
We have four options to consider:
1. Escherichia coli
2. Bacillus subtilis
3. Agrobacterium tumefaciens
4. Pseudomonas putida

### Step 3: Define Genetically Engineered Bacteria
Genetically engineered bacteria are those whose DNA has been modified to enhance certain traits or functions, making them useful for specific applications, such as bioremediation.

### Step 4: Consider the Environmental Context
Oil spills are a significant environmental issue, and the bacteria used for cleaning them should ideally thrive in aquatic environments, as oil spills occur in water bodies.

### Step 5: Evaluate Each Option
- **Escherichia coli**: While it is a commonly used bacterium in genetic engineering, it is not typically associated with oil spill remediation.
- **Bacillus subtilis**: This bacterium is used in various applications but is not primarily known for oil spill cleanup.
- **Agrobacterium tumefaciens**: This bacterium is mainly used in plant genetic engineering and is not relevant to oil spills.
- **Pseudomonas putida**: This bacterium is known for its ability to degrade various pollutants, including hydrocarbons found in oil, making it suitable for bioremediation.

### Step 6: Identify the Correct Answer
Based on the analysis, the genetically engineered bacteria that is used for clearing oil spills is **Pseudomonas putida**.

### Final Answer
The correct answer is **Pseudomonas putida**.

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