Conversion of ammonia into nitrates through Nitrosomonas is called :

Options

A. Nitrogen fixation
B. Nitrification
C. Denitrification
D. Ammonification

Answer

**Step-by-Step Solution:**

1. **Understanding the Process**: The question asks about the conversion of ammonia into nitrates specifically through the action of the bacterium Nitrosomonas.

2. **Identifying the Process**: This conversion is part of a larger biological process known as nitrification. Nitrification involves the oxidation of ammonia into nitrite and then further into nitrate.

3. **Breaking Down Nitrification**:
- The first step of nitrification involves the oxidation of ammonia (NH3) into nitrite (NO2-) by the bacterium Nitrosomonas.
- The reaction can be summarized as:
\[ 2NH3 + 3O2 \rightarrow 2NO2- + 2H2O + \text{energy} \]
- The second step involves the oxidation of nitrite (NO2-) into nitrate (NO3-) by another bacterium called Nitrobacter:
\[ 2NO2- + O2 \rightarrow 2NO3- + \text{energy} \]

4. **Conclusion**: Therefore, the conversion of ammonia into nitrates through Nitrosomonas is called **Nitrification**.

**Final Answer**: Nitrification

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