Extermosphiles are characteristic of which of the following groups?

Options

A. Archaebacteria
B. Eubacteria
C. Chordata
D. Arthropods

Answer

To determine which group extremophiles are characteristic of, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Term "Extremophiles":**
- Extremophiles are organisms that thrive in extreme environmental conditions, such as high temperature, acidity, salinity, or pressure.

2. **Identify the Groups Mentioned:**
- The options provided are:
- A) Archaeobacteria
- B) Eubacteria
- C) Chordata
- D) Arthropods

3. **Analyze Each Group:**
- **Archaeobacteria (Archaea):** This group includes organisms that often live in extreme environments, such as hot springs and salt lakes. They are known for their ability to withstand extreme conditions.
- **Eubacteria (Bacteria):** While some bacteria can be extremophiles, many are not. This group is more diverse and includes many organisms that live in moderate conditions.
- **Chordata:** This is a phylum that includes vertebrates (like mammals, birds, reptiles, etc.) and does not typically include extremophiles.
- **Arthropods:** This group includes invertebrates such as insects and crustaceans, which are not known for thriving in extreme environments.

4. **Conclude the Correct Group:**
- Based on the analysis, the group that is characteristic of extremophiles is **Archaeobacteria** (Archaea). They are specifically adapted to extreme conditions.

### Final Answer:
**Archaeobacteria (Archaea)** are characteristic of extremophiles.

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