Which of the following statements is wrong about Archaebacteria?

Options

A. They live in some of the most harsh habitats
B. They are recently evolved group
C. Cell wall is peptidoglycanless
D. They are unlike most other bacteria

Answer

To determine which statement about Archaebacteria is incorrect, we will analyze each option provided in the question step by step.

### Step-by-Step Solution:

1. **Understanding Archaebacteria**:
- Archaebacteria are a group of microorganisms that are distinct from true bacteria (Eubacteria). They are known for their ability to thrive in extreme environments.

2. **Analyzing the Statements**:
- **Option 1**: "They live in some of the most harsh habitats."
- This statement is **true**. Archaebacteria are often found in extreme environments such as hot springs, salt lakes, and deep-sea vents.

- **Option 2**: "They are a recently evolved group."
- This statement is **false**. Archaebacteria are considered to be some of the most primitive and ancient forms of life. They evolved before Eubacteria, making them one of the earliest life forms on Earth.

- **Option 3**: "Their cell wall is peptidoglycan less."
- This statement is **true**. Archaebacteria do not have peptidoglycan in their cell walls, which distinguishes them from Eubacteria that do contain peptidoglycan.

- **Option 4**: "They are unlike most other bacteria."
- This statement is **true**. Archaebacteria have unique biochemical and genetic characteristics that set them apart from Eubacteria.

3. **Conclusion**:
- The statement that is wrong about Archaebacteria is **Option 2**: "They are a recently evolved group."