Most famous symbiotic nitrogen fixing bacteria

Options

A. Nitrobacter
B. Nitrosomonas
C. Ntrosococcus
D. Rhizobium

Answer

**Step-by-Step Solution:**

1. **Understanding Symbiotic Nitrogen-Fixing Bacteria**:
- Symbiotic bacteria are those that live in a mutually beneficial relationship with another organism. In this case, we are looking for bacteria that fix nitrogen in a symbiotic manner.

2. **Identifying the Most Famous Bacteria**:
- Among the various nitrogen-fixing bacteria, we need to identify the one that is most well-known for its symbiotic relationship with plants.

3. **Recognizing Rhizobium**:
- The most famous symbiotic nitrogen-fixing bacteria is **Rhizobium**. These bacteria form nodules on the roots of leguminous plants (like peas and beans) and are crucial for converting atmospheric nitrogen into a form that plants can use.

4. **Function of Rhizobium**:
- Rhizobium bacteria convert inorganic nitrogen (N2 from the atmosphere) into organic forms (like ammonia) that can be utilized by plants. This process is essential for plant growth and contributes to soil fertility.

5. **Conclusion**:
- Therefore, the answer to the question is **Rhizobium**, which is the most famous symbiotic nitrogen-fixing bacteria.

**Final Answer**: D) Rhizobium

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