Archaebacteria can survive harsh environments due to the presence of

Options

A. Cell wall
B. Plasma membrane
C. Mesosomes
D. Nucleoid

Answer

**Step-by-Step Solution:**

1. **Understanding Archaebacteria**: Archaebacteria are a group of microorganisms that are distinct from bacteria and eukaryotes. They are known for their ability to thrive in extreme environments.

2. **Types of Archaebacteria**: There are three main types of archaebacteria:
- **Halophiles**: These organisms thrive in highly saline environments, such as salt lakes.
- **Thermoacidophiles**: These archaebacteria can survive in hot springs and acidic environments.
- **Methanogens**: These are found in anaerobic environments, such as marshes, and produce methane.

3. **Survival Mechanism**: The ability of archaebacteria to survive in harsh conditions is primarily due to their unique **plasma membrane**.

4. **Composition of Plasma Membrane**: The plasma membrane of archaebacteria is made up of **phospholipids**. Unlike typical bacterial phospholipids, those in archaebacteria are composed of glycerol ether lipids, which provide stability and resilience under extreme conditions.

5. **Conclusion**: Therefore, the correct answer to the question is that archaebacteria can survive harsh environments due to the presence of their **plasma membrane**.

**Final Answer**: The presence of plasma membrane allows archaebacteria to survive in harsh environments.

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