Coralloid roots are the characteristics of `:`

Options

A. Leguminous plants
B. Cycas
C. Ferns
D. Mosses

Answer

To solve the question "Coralloid roots are the characteristics of:", we need to identify which group of plants is associated with coralloid roots. Here’s a step-by-step solution:

### Step-by-Step Solution:

1. **Understand the Term "Coralloid Roots":**
- Coralloid roots are specialized roots that are typically found in certain plants. They are characterized by their coral-like appearance and are involved in symbiotic relationships with nitrogen-fixing organisms.

2. **Identify the Plants Associated with Coralloid Roots:**
- Coralloid roots are primarily associated with the plant genus **Cycas**, which is a type of gymnosperm.

3. **Explore the Characteristics of Coralloid Roots:**
- These roots are known to host nitrogen-fixing cyanobacteria, which help the plant in nitrogen assimilation, making them crucial for the plant's growth in nitrogen-poor soils.

4. **Differentiate Between Plant Groups:**
- While leguminous plants have roots that associate with Rhizobium bacteria for nitrogen fixation, coralloid roots specifically refer to those found in Cycas, a gymnosperm. Ferns and mosses do not have coralloid roots.

5. **Conclusion:**
- Based on the above points, we can conclude that coralloid roots are characteristic of **Cycas**, which is a gymnosperm.

### Final Answer:
Coralloid roots are the characteristics of **Cycas** (a genus of gymnosperms).

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