archéens
The Archéens, also known as Archaea, are a domain of single-celled microorganisms that are distinct from bacteria and eukaryotes. They were first identified in the late 20th century and represent one of the three domains of life, alongside Bacteria and Eukarya. Archaea are prokaryotic organisms, meaning they lack a nucleus and other membrane-bound organelles, similar to bacteria. However, they share several genetic and biochemical traits with eukaryotes, such as the structure of their RNA polymerase and the process of transcription.
Archaea are widely distributed in extreme environments, earning them the nickname "extremophiles." They thrive in harsh
Genetically, archaea possess unique features. Their cell walls lack peptidoglycan, which is found in bacterial cell
Archaea play important roles in various ecological processes, including methane production (methanogenesis) and nitrogen cycling. They