A prokaryote (/ proʊˈkærioʊt, - ət /; less commonly spelled procaryote) [1] is a microorganism whose usually single cell lacks a nucleus or other membrane-bound organelles. [2]

Nov 20, 2025 · Prokaryote, any organism that lacks a distinct nucleus and other organelles due to the absence of internal membranes. Bacteria are among the best-known prokaryotic organisms.

May 24, 2024 · Prokaryotes are single-celled organisms that are the earliest and most primitive forms of life on Earth. As organized in the Three Domain System, prokaryotes include bacteria …

Dec 18, 2016 · Organisms that have prokaryotic cells are unicellular. They are called “prokaryotes.” The prokaryotic cell has several elements that allow it to function as a living …

Jan 30, 2025 · Prokaryotes are small, single-celled organisms with a simple structure. Unlike other cells, they don’t have a nucleus or other membrane-bound organelles.

Jul 22, 2022 · A prokaryote is defined as any organism that is chiefly characterized by a cell devoid of a well-defined (i.e., membrane-bound) nucleus as opposed to a eukaryote that has a …

Jul 26, 2025 · Prokaryotes represent a fundamental category of life forms, distinguished by their cellular organization. These microscopic organisms are single-celled and lack the complex …

Prokaryotes were the first inhabitants on Earth, appearing 3.5 to 3.8 billion years ago. These organisms are abundant and ubiquitous; that is, they are present everywhere.

A prokaryote is a simple, unicellular organism that lacks an organized nucleus or other membrane-bound organelle.

Feb 2, 2023 · ‘Pro’ means ‘before’ and ‘kary’ means ‘nucleus’. Prokaryotes are simple, single-celled organisms that are the most primitive life form on earth. It includes two domains – …