Mycorrhizal roots of _____are associated with some fungal symbionts.

Options

A. Pinus
B. Cedrus
C. Cycas
D. Ginkgo

Explanation

To solve the question, "Mycorrhizal roots of _____ are associated with some fungal symbionts," we need to identify which of the given options is known for having mycorrhizal associations with fungi.

**Step-by-Step Solution:**

1. **Understand Mycorrhizal Roots**: Mycorrhizal roots are a type of symbiotic relationship between plant roots and fungi. In this relationship, both the plant and the fungus benefit. The fungus helps the plant absorb water and nutrients from the soil, while the plant provides carbohydrates to the fungus.

2. **Analyze the Options**: The options provided are:
- A) Pinus
- B) Sidrus
- C) Cycus
- D) Jynko

3. **Identify Characteristics of Each Option**:
- **Pinus**: This is a genus of coniferous trees known as pines. They often form mycorrhizal associations with fungi, which help them thrive in nutrient-poor soils.
- **Sidrus**: This option is less commonly discussed in relation to mycorrhizal associations.
- **Cycus**: This refers to cycads, which may have some mycorrhizal relationships but are not as well-known for them.
- **Jynko**: This likely refers to Ginkgo, which is not typically associated with mycorrhizal fungi.

4. **Conclusion**: Based on the understanding of mycorrhizal associations, the most well-known plant associated with mycorrhizal roots is **Pinus**. Therefore, the correct answer is **A) Pinus**.

**Final Answer**: Mycorrhizal roots of **Pinus** are associated with some fungal symbionts.

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