Non-living components of xylem tissues are involved in

Options

A. Symplast pathway
B. Apoplast pathway
C. Osmosis
D. Active transport

Answer

### Step-by-Step Solution:

1. **Understanding Xylem Tissues**:
- Xylem is a type of vascular tissue in plants responsible for the transport of water and nutrients from the roots to the rest of the plant. It consists of both living and non-living components.

2. **Identifying Non-Living Components**:
- The non-living components of xylem include dead cells such as tracheids and vessel elements, as well as the cell walls of these cells. These components are crucial for the function of xylem.

3. **Water Transport Pathways**:
- There are two main pathways for water transport in plants: the apoplast pathway and the symplast pathway.
- **Apoplast Pathway**: This pathway involves the movement of water through the cell walls and intercellular spaces. Since it does not involve living cells, it is primarily associated with the non-living components of xylem.
- **Symplast Pathway**: In contrast, this pathway involves the movement of water through the cytoplasm of living cells, which is a slower process due to the need for diffusion.

4. **Analyzing the Options**:
- Option A: Symplast pathway - Incorrect, as this involves living components.
- Option B: Apoplast pathway - Correct, as this involves non-living components.
- Option C: Osmosis - Incorrect, as it does not specifically refer to xylem transport.
- Option D: Active transport - Incorrect, as this also does not pertain to xylem transport.

5. **Conclusion**:
- The correct answer is that the non-living components of xylem tissues are involved in the **apoplast pathway** for water transport.