Soybean transport ureides from root nodules to various plant parts as fixed nitrogen , which

Options

A. is a nitrogen and phosphorus rich compounds
B. carries high `NO_3` than carbohydrates
C. carries high N : C ratio
D. Is highly soluble in organic compounds so , transported through xylem.

Answer

To solve the question regarding the transport of ureides in soybeans, we will analyze the options provided and determine the characteristics of ureides as fixed nitrogen.

### Step-by-Step Solution:

1. **Understanding Ureides**:
- Ureides are organic compounds that contain nitrogen. They are formed during the nitrogen fixation process in legumes, such as soybeans, where atmospheric nitrogen is converted into a usable form for plants.

2. **Analyzing the Options**:
- **Option 1**: "Nitrogen and phosphorus rich compound."
- This option is incorrect. While ureides are rich in nitrogen, they do not contain significant amounts of phosphorus. The primary focus here is on nitrogen content.

- **Option 2**: "Carries high Nitrate than Carbohydrate."
- This option is also incorrect. Ureides are not primarily nitrate; they are a form of fixed nitrogen. They do not carry more nitrate than carbohydrates. Instead, they are transported as nitrogenous compounds.

- **Option 3**: "Carries high Nitrogen-Carbon Ratio."
- This option is correct. Ureides have a high nitrogen-to-carbon ratio, which is characteristic of compounds involved in nitrogen transport in plants. This is essential for the plant's growth and development, as nitrogen is a crucial nutrient.

- **Option 4**: "Highly soluble in organic compound so transported through xylem."
- This option is misleading. While ureides are soluble, they are primarily transported through the phloem, not the xylem. The xylem mainly transports water and minerals, while the phloem is responsible for the transport of organic compounds like ureides.

3. **Conclusion**:
- The correct answer is **Option 3**: "Carries high Nitrogen-Carbon Ratio." This reflects the nature of ureides as compounds that effectively transport fixed nitrogen in soybeans.