Organisms called Methanogens are most abundant in a

Options

A. Sulphur rock
B. Cattle yard
C. Polluted stream
D. Hot spring

Answer

**Step-by-Step Solution:**

1. **Identify the Organisms**: Methanogens are a type of microorganism that belong to the group known as Archaeobacteria. They are known for their unique ability to produce methane gas.

2. **Understand Their Habitat**: Methanogens thrive in anaerobic (oxygen-free) environments. They are commonly found in places where organic matter is decomposed in the absence of oxygen.

3. **Consider the Options Provided**:
- **Option A – Sulphur rock**: While some bacteria can thrive here, it is not a typical habitat for methanogens.
- **Option B – Cattle yard**: This is a suitable environment for methanogens due to the presence of organic waste and anaerobic conditions.
- **Option C – Polluted stream**: Although some bacteria can exist here, it is not specifically known for methanogens.
- **Option D – Hot spring**: This environment is more associated with thermophilic bacteria rather than methanogens.

4. **Conclusion**: Given that methanogens are most abundant in environments rich in organic material and where anaerobic conditions prevail, the best answer is **Option B – Cattle yard**. This is because cattle produce a significant amount of organic waste, creating an ideal environment for methanogens to thrive and produce methane gas.

**Final Answer**: Organisms called methanogens are most abundant in a cattle yard (Option B).

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