Question

What is true for Archaebacteria?

• A. All are halophiles
• B. All are photosynthetic
• C. All are fossils
• D. Oldest living organisms

Answer 1

The correct option is D Oldest living organisms

The archaebacteria are the primitive, single-celled, prokaryotic organisms. These are the ancient and oldest living organisms. These were the first organism which evolved on the Earth. These organisms have evolved to survive in the extreme conditions like the halophiles, thermophiles, acidophiles, methanogens, etc.

Thus, the correct answer is option D.