Funaria differs from Pteridium in the absence of

Options

A. Stem
B. Archegonia
C. Embryo
D. Root.

Answer

To solve the question "Funaria differs from Pteridium in the absence of", we need to analyze the characteristics of both Funaria and Pteridium.

### Step-by-Step Solution:

1. **Identify the Classification**:
- Funaria is a genus of mosses belonging to the class Bryophyta.
- Pteridium is a genus of ferns belonging to the class Pteridophyta.

2. **Understand the Structure of Funaria**:
- Funaria, being a bryophyte, is a non-vascular plant. It has a simple structure that includes leaf-like structures, a stem-like structure, and rhizoids, which act as anchoring structures but are not true roots.

3. **Understand the Structure of Pteridium**:
- Pteridium, as a pteridophyte, is a vascular plant. It has a more complex structure that includes true roots, stems, and leaves.

4. **Analyze the Reproductive Structures**:
- Funaria has archegonia, which are the female reproductive structures where fertilization occurs and an embryo is formed.
- Pteridium also has archegonia, and after fertilization, it also forms an embryo.

5. **Compare the Presence of Structures**:
- Funaria does not have true roots; it has rhizoids instead.
- Pteridium has true roots.

6. **Conclusion**:
- The main difference between Funaria and Pteridium is that Funaria lacks true roots, which are present in Pteridium. Therefore, the correct answer to the question is option D: root.

### Final Answer:
**Funaria differs from Pteridium in the absence of D. Root.**

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