Which one of the following is the major difference between mosses and ferns ?

Options

A. Ferns lack alternation of generation, while mosses show the same
B. Mosses are facultative aerobes, while ferns are obligate aerobes
C. Vascular bundles of ferns show xylem vessels, while those of mosses lack it
D. Mosses require water for fertilisation while ferns does not require water

Answer

To determine the major difference between mosses and ferns, we can analyze the characteristics of both groups of plants step by step.

### Step-by-Step Solution:

1. **Identify the Groups**:
- Mosses belong to the group known as Bryophytes.
- Ferns belong to the group known as Pteridophytes.

2. **Reproductive Structures**:
- Mosses reproduce through spores and have a dominant gametophyte stage.
- Ferns also reproduce through spores but have a dominant sporophyte stage.

3. **Vascular Tissue**:
- Mosses lack true vascular tissue, which means they do not have specialized structures for transporting water and nutrients.
- Ferns possess vascular tissue, including xylem and phloem, which allows for efficient transport of water and nutrients.

4. **Body Structure**:
- The body of mosses is not differentiated into true roots, stems, and leaves; they have structures that resemble these but are not true organs.
- Ferns have a well-differentiated body with true roots, stems, and leaves.

5. **Conclusion**:
- The major difference between mosses and ferns lies in the presence of vascular tissue. Ferns have vascular bundles that contain xylem vessels, while mosses lack these structures.

### Final Answer:
The major difference between mosses and ferns is that ferns have vascular bundles that show xylem vessels, whereas mosses lack vascular bundles.

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