Gymnosperms are characterised by

Options

A. Multiflagellate sperms
B. Naked seeds
C. Winged seeds
D. Seeds inside fruits.

Answer

### Step-by-Step Text Solution:

1. **Understanding Gymnosperms**:
- Gymnosperms are a group of seed-producing plants that include conifers, cycads, Ginkgo, and gnetophytes. They are distinct from angiosperms (flowering plants) primarily due to their reproductive structures.

2. **Key Characteristics**:
- The most notable characteristic of gymnosperms is that they produce "naked seeds." This means that their seeds are not enclosed within an ovary or fruit. Instead, they are exposed on the surface of cone scales or other structures.

3. **Analyzing the Options**:
- **Option 1: Multi-flagellate sperm** - This is not a defining characteristic of gymnosperms. While some gymnosperms may have flagellated sperm, it is not a universal trait.
- **Option 2: Naked seed** - This is the correct answer. Gymnosperms are defined by their naked seeds, which are not enclosed in a fruit.
- **Option 3: Winged seed** - Some gymnosperms may have winged seeds, but this is not a characteristic that applies to all gymnosperms.
- **Option 4: Seeds inside proof** - This is incorrect as gymnosperms do not have seeds enclosed within a fruit.

4. **Conclusion**:
- Based on the analysis, the correct characteristic that defines gymnosperms is "naked seed." Therefore, the answer is **Option 2: Naked seed**.