Which one of the following pairs is correctly matched ?

Options

A. Rhizobium - parasite in the roots of leguminous plants
B. Mycorrhizae - Mineral uptake from soil
C. Yeast - product of biogas
D. Myxomycetes - The disease ringworm

Answer

To solve the question "Which one of the following pairs is correctly matched?", we will analyze each option provided.

### Step-by-Step Solution:

1. **Option 1: Rhizobium - Parasite in the root of leguminous plants**
- **Analysis**: Rhizobium is a bacterium that forms a symbiotic relationship with leguminous plants, where it fixes nitrogen for the plant. It is not a parasite; rather, it benefits the plant.
- **Conclusion**: This option is incorrect.

2. **Option 2: Mycorrhizae - Mineral uptake from the soil**
- **Analysis**: Mycorrhizae refers to the symbiotic association between fungi and plant roots. The fungi help in the absorption of minerals and water from the soil, while the plants provide carbohydrates to the fungi.
- **Conclusion**: This option is correct.

3. **Option 3: Yeast - Product of biogas**
- **Analysis**: Yeast is a type of fungus that is primarily used in fermentation processes to produce alcohol and carbon dioxide. Biogas is primarily composed of methane and carbon dioxide, and yeast is not directly involved in its production.
- **Conclusion**: This option is incorrect.

4. **Option 4: Mixomycetes - Disease of Ringworm**
- **Analysis**: Mixomycetes, or slime molds, are not responsible for causing ringworm. Ringworm is a fungal infection caused by dermatophytes, which are a different group of fungi.
- **Conclusion**: This option is incorrect.

### Final Answer:
The only correctly matched pair is **Option 2: Mycorrhizae - Mineral uptake from the soil**.

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