MCQ IN MEDICINE

Detailed explanation-1: -Bacteria and archaea are single-celled, while most eukaryotes are multicellular.

Detailed explanation-2: -Answer and Explanation: A single-celled microscopic prokaryotic organism can either be called a bacteria or archaea. The difference between bacteria and archaea is that archaea are more closely associated with eukaryotes than bacteria.

Detailed explanation-3: -Bacteria and archaea are all unicellular prokaryotes.

Detailed explanation-4: -The bacteria are the oldest and simplest living organisms, and all of the bacteria are “prokaryotes, ‘’ meaning that they do not have a true membrane-bound nucleus as eukaryotes do. [Prokaryote is derived from Greek, meaning “before nucleus"; eukaryote means “true nucleus."]