Plants like clover and beans, that have nitrogen-fixing bacteria in their roots, belong to the family :

Options

A. Fabaceae
B. Brassicaceae
C. Solanaceae
D. Asteraceae

Answer

**Step-by-Step Solution:**

1. **Identify the Plants**: The question mentions plants like clover and beans. These are known for their ability to fix nitrogen in their roots.

2. **Recognize the Family**: The plants clover and beans belong to a specific family in the plant kingdom. This family is known for having nitrogen-fixing bacteria associated with their roots.

3. **Determine the Family Name**: The family that includes clover and beans is the **Fabaceae** family. This family is also known as the legume family.

4. **Understand the Role of Nitrogen-Fixing Bacteria**: Within the roots of these plants, there are root nodules that contain nitrogen-fixing bacteria. These bacteria play a crucial role in converting atmospheric nitrogen into a form that plants can use.

5. **Example of Nitrogen-Fixing Bacteria**: One of the well-known nitrogen-fixing bacteria associated with the roots of plants in the Fabaceae family is **Rhizobium**.

6. **Symbiotic Relationship**: The relationship between the plants and the nitrogen-fixing bacteria is symbiotic. The bacteria receive energy from the plant in the form of amino acids, while they help the plant by fixing nitrogen into ammonia, which the plant can utilize.

**Final Answer**: Plants like clover and beans, which have nitrogen-fixing bacteria in their roots, belong to the family **Fabaceae**.

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