Some hyperthermophilic organisms that grow in highly acidic `(pH2)` habitats belong to the two groups

Options

A. Liverworts and yeasts
B. Eubacteria and archaea
C. Cyanobacteria and diatoms
D. Protists and mosses

Answer

To solve the question regarding hyperthermophilic organisms that thrive in highly acidic habitats, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terms**:
- **Hyperthermophilic Organisms**: These are organisms that can survive and thrive at extremely high temperatures, typically above 80°C.
- **Acidophilic Organisms**: These organisms thrive in highly acidic environments, usually at a pH of 2 or lower.

2. **Identify the Groups**:
- We need to identify which of the given groups of organisms can be classified as hyperthermophilic and acidophilic.
- The options provided are:
- Liverworts and yeast
- Eubacteria and Archaebacteria
- Cyanobacteria and diatoms
- Protists and mosses

3. **Analyze Each Option**:
- **Liverworts and Yeast**: Liverworts are plants, and while yeast can tolerate some acidic conditions, they are not typically classified as hyperthermophilic.
- **Eubacteria and Archaebacteria**: Both of these groups contain organisms that can survive in extreme conditions. Archaebacteria, in particular, include many hyperthermophiles and acidophiles.
- **Cyanobacteria and Diatoms**: These are primarily photosynthetic organisms and do not typically thrive in extreme heat or acidity.
- **Protists and Mosses**: Protists are a diverse group, but mosses are not known for thriving in extreme conditions.

4. **Select the Correct Answer**:
- Based on the analysis, the group that includes hyperthermophilic organisms that can also grow in highly acidic habitats is **Eubacteria and Archaebacteria**.

5. **Conclusion**:
- Therefore, the correct answer is **Eubacteria and Archaebacteria**.