Which type of cell lacks a nucleus?

Prokaryotic cells are distinguished by their lack of a nucleus. Instead of a nucleus, the genetic material in prokaryotic cells is located in a region of the cell called the nucleoid, which is not enclosed by a membrane. This is a fundamental characteristic that sets prokaryotes apart from eukaryotic cells, which do contain a defined, membrane-bound nucleus where their DNA is housed.

Understanding this distinction is crucial as it underpins key differences in biology, such as cell structure, reproduction, and functionality. Prokaryotic cells, which include bacteria and archaea, are generally simpler and smaller than eukaryotic cells, which encompass all other forms of life, including plants and animals.