Vessels differ from tracheids in having

Options

A. In being living
B. Presence of perforation plates at both ends
C. Enucleated condition
D. All of the above

Answer

To solve the question "Vessels differ from tracheids in having," we need to analyze the characteristics of both vessels and tracheids, which are types of cells found in the xylem tissue of plants.

### Step-by-Step Solution:

1. **Understand the Definitions**:
- **Vessels**: These are specialized structures in the xylem that facilitate the efficient transport of water and minerals. They are composed of vessel members that are connected end-to-end.
- **Tracheids**: These are elongated cells in the xylem that also help in water transport but are less efficient compared to vessels.

2. **Identify Key Differences**:
- **Living vs. Dead**: Both vessels and tracheids are dead at maturity, as they lack protoplasm. Therefore, the option stating that vessels differ from tracheids in being living is incorrect.
- **Perforation Plates**: Vessels have perforation plates at their ends, which allow for the free flow of water between vessel elements. In contrast, tracheids do not have perforation plates; they have tapered ends and rely on pits for water movement.
- **Enucleated Condition**: Both vessels and tracheids are enucleated (they lack a nucleus) because they are dead cells. Thus, this option is also incorrect.

3. **Evaluate the Options**:
- **Option 1**: Being living - Incorrect (both are dead).
- **Option 2**: Presence of perforation plates at both ends - Correct (only vessels have this).
- **Option 3**: Enucleated conditions - Incorrect (both are enucleated).
- **Option 4**: All of the above - Incorrect (not all statements are true).

4. **Conclusion**: The correct answer is the presence of perforation plates at both ends, which distinguishes vessels from tracheids.

### Final Answer:
**Vessels differ from tracheids in having the presence of perforation plates at both ends.**