Which prokaryotes are most likely to be found in extreme environments?
Accordingly, which of the following organisms are most likely to be found in extreme environments? Most extremophiles are microorganisms (and a high proportion of these are archaea), but this group also includes eukaryotes such as protists (e.g., algae, fungi and protozoa) and multicellular organisms. Archaea is the main group to thrive in extreme environments.