Tracheids differ from other tracheary elements in

Options

A. being lignified
B. having casparian strips
C. being imperforate
D. lacking nucleus

Answer

**Step-by-Step Solution:**

1. **Understanding Tracheary Elements**:
- Tracheary elements are specialized cells in the xylem that facilitate the conduction of water and minerals. The two main types of tracheary elements are tracheids and vessels.

2. **Characteristics of Tracheids**:
- Tracheids are elongated, dead cells with closed end walls. They are lignified, meaning their cell walls contain lignin, which provides structural support.

3. **Characteristics of Vessels**:
- Vessels are also elongated, dead cells but have perforated end walls, allowing for more efficient water transport. They are also lignified.

4. **Comparing Tracheids and Vessels**:
- Tracheids have pits that allow water to move from one tracheid to another, while vessels have perforation plates that connect them to each other.

5. **Analyzing the Options**:
- **Being lignified**: Both tracheids and vessels are lignified, so this option does not differentiate them.
- **Having casparian strips**: Casparian strips are found in the endodermis, not in tracheids or vessels, making this option irrelevant.
- **Being imperforate**: Tracheids do not have perforations, while vessels do. This is a key difference.
- **Lacking nucleus**: Both tracheids and vessels lack a nucleus, so this option is also not a differentiator.

6. **Conclusion**:
- The correct answer is that tracheids differ from other tracheary elements in being imperforate, meaning they do not have perforations in their end walls.

**Final Answer**: Tracheids differ from other tracheary elements in being imperforate.

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