Mycorrhiza is correctly described as

Options

A. Parasitic association between roots and some fungi
B. Symbiotic relationship between fungi and roots of higher plants
C. Symbiosis of algae and fungi
D. Relation of ants with the stem of some trees

Answer

**Step-by-Step Solution:**

1. **Understanding Mycorrhiza**: Mycorrhiza refers to the symbiotic association between fungi and the roots of plants. This relationship is crucial for the growth and health of many plants.

2. **Defining Symbiotic Relationship**: A symbiotic relationship is one where both organisms involved benefit from each other. In the case of mycorrhiza, both the fungus and the plant gain advantages.

3. **Role of Fungi**: The fungi in this relationship help in the absorption of nutrients, particularly phosphorus, from the soil. Phosphorus is often found in an inorganic form in the soil, which is not readily available for plant uptake.

4. **Conversion of Nutrients**: The fungi convert inorganic phosphorus into organic forms that can be easily absorbed by the plant roots. This process enhances the plant's ability to access essential nutrients.

5. **Role of Plants**: In return, the plants provide the fungi with carbohydrates, primarily in the form of glucose, which they produce through photosynthesis. This serves as a food source for the fungi.

6. **Conclusion**: Therefore, mycorrhiza is correctly described as a symbiotic relationship between fungi and the roots of higher plants, where both parties benefit from the exchange of nutrients.

**Final Answer**: Mycorrhiza is correctly described as a symbiotic relationship between fungi and the roots of higher plants.

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