Give one function of Rhizobium.

Explanation

**Step-by-Step Solution:**

1. **Identify the Organism**: Recognize that Rhizobium is a type of bacteria.
- Hint: Think about the classification of organisms and where bacteria fit in.

2. **Understand its Role**: Rhizobium is known for its symbiotic relationship with certain plants, particularly legumes.
- Hint: Recall what symbiosis means and how it applies to plant-bacteria interactions.

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