Which one of the following characteristics can be used to distinguish gymnosperms from angiosperms ?

Options

A. Presence of pollen chamber in gymnosperms
B. Presence of naked ovules in gymnosperms
C. Presence of stomata in angiosperms
D. Absence of naked ovules in gymnosperms

Explanation

To distinguish gymnosperms from angiosperms, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definitions**:
- Gymnosperms are a group of seed-producing plants that do not form flowers or fruits. Their seeds are exposed or "naked."
- Angiosperms, on the other hand, are flowering plants that produce seeds enclosed within a fruit.

2. **Analyze the Options**:
- **Option 1**: Presence of pollen chamber in gymnosperms - This feature is not exclusive to gymnosperms as angiosperms also have structures for pollen.
- **Option 2**: Presence of naked ovules in gymnosperms - This is a defining characteristic of gymnosperms, as their ovules are not enclosed.
- **Option 3**: Presence of stomata in angiosperms - Stomata are present in many plant types, not just angiosperms.
- **Option 4**: Absence of naked ovules in gymnosperms - This statement is incorrect because gymnosperms do have naked ovules.

3. **Identify the Correct Characteristic**:
- The characteristic that distinctly differentiates gymnosperms from angiosperms is the presence of naked ovules in gymnosperms (Option 2).

4. **Conclusion**:
- Therefore, the correct answer to the question is the second option: "presence of naked ovules in gymnosperms."