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  1. Archaea - Wikipedia

    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 …

  2. Archaea | Definition, Characteristics, & Examples | Britannica

    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 …

  3. What are Archaea? | Microbiology Society

    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 …

  4. What Are Archaea and How Are They Different from Bacteria?

    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 …

  5. Archaea – General Microbiology - Open Educational Resources

    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.

  6. Archaea in the Human Microbiome and Potential Effects on ...

    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 …

  7. Archaea - Definition, Examples, Characteristics, and Diagram

    Oct 19, 2023 · What is the kingdom archaea and where are they found? Learn its types, examples, and characteristics, along with a diagram.