Mycorrhizal represents an intimate mutualistic relationship between

Options

A. fungi and stem of higher plants
B. fungi and roots of higher plants
C. fungi and leaves of higher plants
D. fungi and leaflets of higher plants

Answer

To solve the question regarding the mutualistic relationship represented by Mycorrhizal, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Mycorrhizae**: Mycorrhizae refers to a symbiotic association between fungi and the roots of higher plants. This relationship is crucial for the nutrient uptake of the plants.

2. **Identifying the Components**: In this relationship, the fungi colonize the roots of the plants. The fungi benefit from the plant by receiving sugars and amino acids produced through photosynthesis.

3. **Function of Fungi**: The fungi enhance the plant's ability to absorb water and essential nutrients, particularly phosphorus, from the soil. This is vital for the growth and health of the plant.

4. **Mutual Benefits**: The relationship is mutualistic because both organisms benefit. The plant receives improved nutrient and water absorption, while the fungi receive organic compounds from the plant.

5. **Analyzing the Options**:
- Option A: Fungi and stem of fire plants - Incorrect, as mycorrhizae involves roots, not stems.
- Option B: Fungi and roots of fire plants - Correct, as this is the definition of mycorrhizae.
- Option C: Fungi and leaves of fire plants - Incorrect, as mycorrhizae does not involve leaves.
- Option D: Fungi and leaflets of fire plants - Incorrect, for the same reason as option C.

6. **Conclusion**: Based on the understanding of mycorrhizal relationships, the correct answer is option B: fungi and roots of fire plants.

### Final Answer:
The correct answer is **B. fungi and roots of fire plants**.