Question Detail
Question
The prokaryotic cells living in extreme habitats and are evolutionarily closer to the eukaryotes than bacteria are grouped in: a. Archaeobacteria b. Eubacteria c. Mammalia d. Archaea
Correct Answer
Option D is the correct answer.
Detailed Explanation
In the three-domain system, prokaryotes are divided into two domains: Bacteria and Archaea. Archaea (formerly known as Archaebacteria) include many extremophiles and are genetically and biochemically more similar to eukaryotes than to bacteria.
Hint
These 'ancient' ones are often found in extreme environments and are genetically unique.