Archaebacteria differ from other bacteria in having different……..

Options

A. Size
B. Shape
C. Cell wall
D. Ribosome

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:**
The question asks how archaebacteria differ from other bacteria. We need to identify the key differences between archaebacteria and eubacteria (true bacteria).

2. **Identifying the Types of Bacteria:**
Bacteria are classified into two main groups: archaebacteria and eubacteria. Archaebacteria are known for their ability to survive in extreme environments.

3. **Examining the Options:**
The options provided are:
- Option 1: Size
- Option 2: Shape
- Option 3: Cell wall
- Option 4: Typosome

4. **Analyzing the Differences:**
- **Size and Shape:** Both archaebacteria and eubacteria can vary in size and shape, so these options are not significant distinguishing factors.
- **Cell Wall Composition:** The major difference lies in the composition of their cell walls. Eubacteria have cell walls made of peptidoglycan, while archaebacteria have cell walls composed of glycoproteins, polysaccharides, and glycolipids.
- **Typosome:** This term does not relate to a known characteristic of bacteria.

5. **Conclusion:**
Based on the analysis, the correct answer is that archaebacteria differ from other bacteria in having different **cell walls**.

**Final Answer:**
Archaebacteria differ from other bacteria in having different **cell walls** (Option 3).

---