A type of cell lacking a membrane-enclosed nucleus and membrane-enclosed organelles; found only in the domains Bacteria and Archaea.

• A. Eukaryotic cell
• B. Prokaryotic cell
• C. Plant cell
• D. Animal cell

Answer: (B)

Prokaryotic cells are defined by their lack of a membrane-enclosed nucleus and membrane-bound organelles. This simple organization sets them apart from eukaryotic cells, which all have a true nucleus and various organelles wrapped in membranes. Prokaryotes live in the Bacteria and Archaea domains, with their DNA typically found in a region called the nucleoid rather than inside a nucleus. The description in the question matches these features, so this type of cell is the best fit. In contrast, plant and animal cells are eukaryotic and contain a nucleus and membrane-bound organelles, so they don’t fit the description.