Nodules in soybeam plant export the fixed nitrogen in the form of

Options

A. ureides
B. amides
C. amino acids
D. both b and c

Explanation

**Step-by-Step Solution:**

1. **Identify the Organism**: The question refers to the soybean plant, which is a leguminous plant known for its ability to fix atmospheric nitrogen.

2. **Understand the Function of Nodules**: In leguminous plants like soybeans, root nodules are formed in association with nitrogen-fixing bacteria (such as Rhizobium). These nodules are responsible for the conversion of atmospheric nitrogen (N₂) into a usable form for the plant.

3. **Nitrogen Fixation Process**: The nitrogen fixation process in the nodules converts atmospheric nitrogen into ammonia (NH₃). This ammonia can then be further processed into other nitrogenous compounds.

4. **Export Form of Fixed Nitrogen**: The question specifically asks in what form the fixed nitrogen is exported from the nodules. The fixed nitrogen is primarily transported in the form of ureates.

5. **Evaluate the Options**:
- **Ureates**: These are acyl derivatives of urea and represent a form of nitrogen that can be used by the plant. This is the correct answer.
- **Amides**: These are derivatives of amino acids and do not play a direct role in nitrogen fixation in this context. Incorrect.
- **Amino Acids**: While they are important for protein synthesis, they are not the primary form of exported fixed nitrogen from nodules. Incorrect.
- **Other Options**: Any other options provided would also be incorrect as they do not represent the primary form of nitrogen exported from nodules.

6. **Conclusion**: Based on the evaluation of the options, the correct answer is that nodules in the soybean plant export the fixed nitrogen in the form of ureates.

**Final Answer**: Ureates

---