A few organism are known to grow and multiply at temperature of `100-105^(@) C`. They belong to

Options

A. Thermophilic sulphur bacteria
B. Hot spring blue-green algae
C. Thermophilic subaerial fungi
D. Marine archaebacteria

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about organisms that can grow and multiply at temperatures between 100°C and 105°C.

2. **Analyzing the Options**: We have four options to consider:
- Thermophilic sulfur bacteria
- Hot spring blue-green algae
- Thermophilic sub-aerial fungi
- Marine archaebacteria

3. **Evaluating Each Option**:
- **Thermophilic Sulfur Bacteria**: These bacteria can survive in high temperatures ranging from 41°C to 122°C, with an optimum growth temperature around 75°C. This means they can tolerate the high temperatures mentioned in the question.
- **Hot Spring Blue-Green Algae**: They have an optimum growth temperature of around 45°C, which is well below the required range.
- **Thermophilic Sub-Aerial Fungi**: These fungi can grow at temperatures between 65°C to 80°C, which is also below the required range.
- **Marine Archaebacteria**: These organisms thrive at temperatures of 35°C to 40°C, which is significantly lower than the range specified.

4. **Conclusion**: Based on the evaluations, the only organisms that can grow and multiply at temperatures of 100°C to 105°C are the **thermophilic sulfur bacteria**.

5. **Final Answer**: The organisms that grow and multiply at temperatures of 100-105°C belong to **thermophilic sulfur bacteria**.

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