rple membrane of halophilic archaea ??? ??? ??? Halophile A microorganism that requires high levels of sodium chloride for growth ??? ??? ??? Hyperthermophile A microorganism that grows optimally at temperatures greater than 85 degrees C ??? ??? ??? Methanogen Strictly anaerobic archaea that derive energy by converting carbon dioxide, hydrogen gas, formate, acetate, and other compounds to either m