Mycorrhiza exhibits the phenomenon of

Options

A. Antagonism
B. Endemism
C. Symbiosis
D. Parasitism

Answer

**Step-by-Step Solution:**

1. **Understanding Mycorrhizae**: Mycorrhizae are a type of symbiotic association between the roots of higher plants and fungal hyphae. This relationship is crucial for the nutrient exchange between the plant and the fungus.

2. **Nutritional Exchange**: In this symbiotic relationship, the fungal hyphae derive their nutrition from the plant roots. The fungus benefits by receiving carbohydrates and other organic substances from the plant.

3. **Increased Surface Area**: In return, the mycorrhizal fungi enhance the root system of the plant by increasing the surface area for water and nutrient absorption. This helps the plant to access more nutrients from the soil.

4. **Mutual Benefit**: Both the plant and the fungus benefit from this relationship. The plant gets improved nutrient uptake, while the fungus receives nourishment.

5. **Identifying the Phenomenon**: The type of relationship exhibited by mycorrhizae is known as **symbiosis**. This term refers to the interaction where both organisms involved benefit from the relationship.

6. **Eliminating Incorrect Options**:
- **Antagonism**: This refers to one organism inhibiting another, which is not the case here.
- **Endemism**: This describes a species being native to a specific location, which does not apply to mycorrhizae.
- **Parasitism**: This involves one organism benefiting at the expense of another, which is contrary to the mutual benefits seen in mycorrhizae.

7. **Conclusion**: Therefore, the correct answer to the question is that mycorrhizae exhibit the phenomenon of **symbiosis**.

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