The chief function of a xylem vessel in a plant body is to -

Options

A. Conduct sap
B. Conduct mineral salts only
C. Eliminate excess of water at night
D. Translocate organic nutrients

Answer

**Step-by-Step Text Solution:**

1. **Understanding Xylem Function**: The xylem is a type of vascular tissue in plants responsible for the transport of water and dissolved minerals from the roots to the rest of the plant.

2. **Identifying Xylem Components**: Xylem vessels are made up of vessel elements, which are specialized cells that facilitate the movement of water and nutrients.

3. **Primary Function of Xylem Vessels**: The chief function of xylem vessels is to conduct sap, which primarily consists of water and dissolved minerals. This process is crucial for maintaining plant hydration and nutrient distribution.

4. **Differentiating from Other Functions**:
- **Conducting Minerals**: While xylem does conduct minerals, it is not limited to just that; it also conducts water, making the option "conduct minerals only" incorrect.
- **Eliminating Excess Water**: The elimination of excess water occurs through transpiration, not directly through xylem vessels. This process involves stomata, making this option incorrect as well.
- **Translocating Organic Nutrients**: The translocation of organic nutrients is primarily the function of phloem, not xylem, which further confirms that this option is incorrect.

5. **Conclusion**: Therefore, the correct answer to the question regarding the chief function of a xylem vessel in a plant body is to conduct sap.

**Final Answer**: The chief function of a xylem vessel in a plant body is to conduct sap.

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