Fern rhizome is

Options

A. Root
B. Stem
C. Rhizophore
D. Rhizoid.

Answer

### Step-by-Step Solution:

1. **Understanding the Term "Rhizome":**
- A rhizome is a type of plant structure that is often confused with roots. It is important to clarify that a rhizome is not a root.

2. **Identifying the Characteristics of a Rhizome:**
- A rhizome is described as a "creeping root stalk." This means it is a horizontal structure that grows underground.

3. **Function of the Rhizome:**
- Rhizomes serve multiple functions:
- They can produce new roots and shoots, allowing for the propagation of new plants.
- They store nutrients, such as starches and proteins.
- They help plants survive unfavorable conditions by allowing them to perennate (survive underground during adverse seasons).

4. **Specifics about Fern Rhizomes:**
- In ferns, the rhizome is specifically referred to as the stem of the fern. It grows horizontally beneath the soil surface.
- Some fern rhizomes may be closer to the surface, but they primarily remain underground.

5. **Evaluating the Options:**
- Option 1: Root - Incorrect. A rhizome is not a root.
- Option 2: Stem - Correct. A rhizome is a stem that grows horizontally underground.
- Option 3: Rhizophore - Incorrect. A rhizophore is a different structure.
- Option 4: Rhizoid - Incorrect. Rhizoids are root hair-like structures, not rhizomes.

6. **Conclusion:**
- The correct answer is that a fern rhizome is a **stem**.