Mycorrhiza exhibits the phenomenon of

Options

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

Answer

To solve the question regarding the phenomenon exhibited by mycorrhiza, we will analyze the options provided and understand the nature of mycorrhiza itself.

### Step-by-Step Solution:

1. **Understand the Options**: The question presents four options: parasitism, symbiosis, antagonism, and endemism. We need to define each of these terms to identify which one applies to mycorrhiza.

2. **Define Parasitism**: Parasitism is a relationship where one organism (the parasite) lives on or in another organism (the host) and causes harm to it. This is not applicable to mycorrhiza, as both organisms benefit from the relationship.

3. **Define Symbiosis**: Symbiosis is a close and often long-term interaction between two different biological species. In this relationship, both organisms typically benefit from each other. This is a key characteristic of mycorrhiza.

4. **Define Antagonism**: Antagonism refers to a relationship where one organism is harmed or inhibited by another. This does not describe the interaction in mycorrhiza, as it is a mutually beneficial relationship.

5. **Define Endemism**: Endemism refers to a species being unique to a specific geographical location. This term does not relate to the interaction between mycorrhiza and plants.

6. **Analyze Mycorrhiza**: Mycorrhiza is a symbiotic association between fungi and the roots of higher plants. In this relationship, fungi enhance the plant's ability to absorb water and nutrients, while the plant provides carbohydrates and shelter to the fungi.

7. **Conclusion**: Since mycorrhiza represents a mutually beneficial relationship between fungi and plant roots, it exemplifies the phenomenon of symbiosis. Therefore, the correct answer is **symbiosis**.

### Final Answer:
Mycorrhiza exhibits the phenomenon of **symbiosis**.

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