A student is performing a chemical analysis of xylem sap. This student should not expect to find much of -

Options

A. Nitrogen
B. Sugar
C. P
D. Water

Answer

**Step-by-Step Solution:**

1. **Understanding Xylem Sap Composition**: Xylem sap is primarily composed of water, minerals, and some organic compounds. The main function of xylem is to transport water and dissolved minerals from the roots to the rest of the plant.

2. **Identifying Major Components**: The major components of xylem sap include:
- Water: The primary component, making up a large part of xylem sap.
- Minerals: These include essential nutrients like phosphates and other minerals.
- Nitrogen: Nitrogen is present in xylem sap, usually in the form of amides.

3. **Considering the Options**: The question provides several options regarding what the student should not expect to find much of in xylem sap. The options are:
- Nitrogen
- Sugar
- Phosphate
- Water

4. **Analyzing Each Option**:
- **Nitrogen**: Present in the form of amides, so it can be found in xylem sap.
- **Sugar**: Primarily transported through phloem, not xylem. Therefore, xylem sap contains very little to no sugar.
- **Phosphate**: A mineral that is indeed found in xylem sap.
- **Water**: The main component of xylem sap.

5. **Conclusion**: Since sugar is primarily transported through phloem and not xylem, the student should not expect to find much sugar in xylem sap.

**Final Answer**: The student should not expect to find much of **sugar** in xylem sap.

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