Mycorrhizal root (having symbiotic fungi) is found -

Options

A. Pinus
B. Ginkgo
C. Cycas
D. None

Answer

**Step-by-Step Solution:**

1. **Understanding Mycorrhizal Roots**: Mycorrhizal roots are a type of root system in which fungi form a symbiotic relationship with the roots of plants. This relationship helps the plant absorb water and nutrients more effectively.

2. **Identifying the Plants**: The question mentions specific plants: Pinus, Ginkgo, Sycopsis, and Nunn. We need to determine which of these plants have mycorrhizal roots.

3. **Classifying the Plants**: All the mentioned plants are classified as Gymnosperms. Gymnosperms are characterized by their production of naked seeds, meaning their seeds are not enclosed in an ovary.

4. **Recognizing the Role of Mycorrhizae**: In Gymnosperms, mycorrhizal associations are common, particularly in certain genera. These associations enhance nutrient uptake, especially phosphorus, and improve the plant's overall health.

5. **Identifying the Specific Plant with Mycorrhizal Roots**: Among the listed plants, Pinus (pine trees) is well-known for having mycorrhizal roots. This association is crucial for their growth in nutrient-poor soils.

6. **Conclusion**: Based on the information, the correct answer to the question is that mycorrhizal roots are found in **Pinus**.

**Final Answer**: Mycorrhizal roots are found in Pinus.

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