Methanogenic Archaeon

Some articles on archaeon:

Eukaryota - Origin of Eukaryotes - Hypotheses For The Origin of Eukaryotes - Chimeric Models
... Chimeric models claim that two prokaryotic cells existed initially – an archaeon and a bacterium ... Thus, the archaeon provided the bacterium with a highly beneficial reduced environment (sulfur and sulfate were reduced to sulfide) ... the necessary fermentation products and electron acceptors along with its motility feature to the archaeon thereby gaining a swimming motility for the organism ...