An analysis of the xylem exudates shows that much of nitrogen is carried in

Options

A. organic form as amides
B. inorganic ions
C. organic form as organic acids
D. ammoniun salts

Explanation

**Step-by-Step Solution:**

1. **Understanding Xylem Exudates**: Xylem exudates refer to the fluid that is released from the xylem vessels of plants. This fluid contains various nutrients and compounds that are transported throughout the plant.

2. **Identifying the Forms of Nitrogen**: Nitrogen can be found in different forms within plants, including organic forms (like amides and organic acids) and inorganic forms (like ammonium ions).

3. **Recognizing the Key Compounds**: The two main organic compounds that carry nitrogen in plants are asparagine and glutamine. Both of these compounds are classified as amides.

4. **Transport Mechanism**: Nitrogen in the form of asparagine and glutamine is transported through the xylem vessels. This transport can occur via active transport (requiring energy) or passive transport (not requiring energy).

5. **Conclusion**: Based on the analysis, the primary form in which nitrogen is carried in the xylem exudates is as amides, specifically as asparagine and glutamine.

**Final Answer**: Much of the nitrogen in xylem exudates is carried in organic form as amides.

---