Which of of these parts in the complex permanent tissue to involve the transport of water is different from the rest ?

Options

A. tracheid
B. Vessel
C. Xylem fibers
D. Xylem parenchyma

Answer

To solve the question regarding which part of the complex permanent tissue involved in the transport of water is different from the rest, we will analyze each option provided.

### Step-by-Step Solution:

1. **Identify the Options**: The question provides four options related to complex permanent tissues involved in the transport of water:
- Tracheids
- Vessels
- Xylem fibers
- Xylem parenchyma

2. **Analyze Tracheids**:
- Tracheids are elongated cells found in the xylem of vascular plants.
- Their primary function is to conduct water and provide mechanical support.
- **Conclusion**: Tracheids are involved in water transport.

3. **Analyze Vessels**:
- Vessels are also part of the xylem and are specialized for the efficient transport of water.
- They are wider than tracheids and allow for faster water movement.
- **Conclusion**: Vessels are primarily responsible for water transport.

4. **Analyze Xylem Fibers**:
- Xylem fibers are supportive cells that provide structural strength to the plant.
- They do not play a role in the transport of water.
- **Conclusion**: Xylem fibers are not involved in water transport.

5. **Analyze Xylem Parenchyma**:
- Xylem parenchyma cells are involved in the storage of food and nutrients.
- While they can assist in the transport of water to some extent, their main function is not water transport.
- **Conclusion**: Xylem parenchyma is primarily for storage, not water transport.

6. **Final Conclusion**:
- Among the options, **xylem fibers** and **xylem parenchyma** do not primarily function in the transport of water. However, since the question asks for the part that is different from the rest in terms of water transport, the correct answer is **xylem fibers** because they are purely supportive and do not conduct water at all, unlike tracheids and vessels.

### Answer:
**Xylem fibers** are different from the rest as they do not participate in the transport of water.