Radial conduction of water and food material in the woody stems is the function of

Options

A. Endodermis
B. xylem fibres
C. Vessels
D. Vascular rays

Answer

To solve the question regarding the radial conduction of water and food material in woody stems, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks about the specific structure responsible for the radial conduction of water and food in woody stems.

2. **Identify the Options**: The options given are:
- a) Endodermis
- b) Xylem fibres
- c) Vessels
- d) Vascular rays

3. **Analyze Each Option**:
- **Endodermis**: This is a layer of cells in roots that regulates the flow of water and nutrients into the vascular system, but it is not primarily involved in radial conduction in stems.
- **Xylem Fibres**: These provide structural support and do not play a significant role in the conduction of water or food.
- **Vessels**: These are part of the xylem and are responsible for the vertical conduction of water, but they do not contribute to radial conduction.
- **Vascular Rays**: These are bands of parenchymatous cells that extend horizontally from the cambium into both the xylem and phloem. They are specifically involved in the radial conduction and storage of water and food materials.

4. **Select the Correct Answer**: Based on the analysis, the correct answer is **d) Vascular rays**. They facilitate the radial movement of water and nutrients across the woody stem.

5. **Conclusion**: Therefore, the radial conduction of water and food material in woody stems is primarily the function of vascular rays.