Leghemoglobin is found in which one of the following organisms ?

Options

A. Anthoceros
B. Aulosira
C. Nostoc
D. Groundnut

Answer

**Step-by-Step Solution:**

1. **Understanding Leghemoglobin**: Leghemoglobin is a red pigment that functions similarly to hemoglobin in animals, primarily responsible for the transport of oxygen. It is a heme protein.

2. **Identifying the Function of Leghemoglobin**: This pigment is specifically found in plants that have nitrogen-fixing nodules. These nodules are formed in association with certain bacteria that can convert atmospheric nitrogen into a form usable by plants.

3. **Recognizing the Type of Plants**: The plants that typically possess leghemoglobin are leguminous plants. Leguminous plants are part of the family Fabaceae and include species such as peas, beans, and groundnuts.

4. **Analyzing the Options**:
- **Anthoceros**: This is a genus of hornworts, which are non-vascular plants and do not belong to the leguminous category.
- **Allocera**: This is not a recognized leguminous plant.
- **Nostoc**: This is a genus of cyanobacteria, not a plant, and does not have leghemoglobin.
- **Groundnut**: Groundnut (Arachis hypogaea) is a leguminous plant and is known to have nitrogen-fixing nodules that contain leghemoglobin.

5. **Conclusion**: Based on the analysis, the correct answer is **Groundnut** as it is the only option that is a leguminous plant and contains leghemoglobin.

**Final Answer**: Groundnut

---