Archaea (/ ɑːrˈkiːə / ⓘ ar-KEE-ə) is a domain of organisms. Traditionally, Archaea included only its prokaryotic members, but has since been found to be paraphyletic, as eukaryotes are known to have …

Nov 26, 2025 · Archaea, any of a group of single-celled prokaryotic organisms with distinct molecular characteristics separating them from bacteria and eukaryotes. The word archaea means ‘ancient’ or …

What are Archaea? Archaea are a group of micro-organisms that are similar to, but evolutionarily distinct from bacteria. Like bacteria they are single celled organisms which lack a membrane bound nucleus, …

Aug 4, 2025 · While archaea look like bacteria on the outside, their genetic and molecular systems are more akin to those found in complex, multicellular life. For example, archaeal RNA polymerase—the …

The Archaea are a group of organisms that were originally thought to be bacteria (which explains the initial name of “archaeabacteria”), due to their physical similarities.

Archaea represent a separate domain of life, next to bacteria and eukarya. As components of the human microbiome, archaea have been associated with various diseases, including periodontitis, …

4 days ago · The tiny pantheon known as the Asgard archaea bear traits that hint at how plants, animals and fungi emerged on Earth.

Oct 8, 2023 · Archaea is a domain of life, together with Bacteria and Eukarya, containing single-celled prokaryotes other than bacteria. They are the oldest life-form known to exist. The name Archaea is …

Archaea are unicellular, prokaryotic microorganisms that differ from bacteria in their genetics, biochemistry, and ecology. Some archaea are extremophiles, living in environments with extremely …

9 hours ago · As for fellow archaea, the smallest known complete genome within this group stretches to 490,000 base pairs, meaning that Sukunaarchaeum contains less than half the number of base pairs …