the determination of the sequence similarity of the ribosomal 16s rna of many bacteria and a few higher organisms has shown that the methanogenic , halophilic , and acido-thermophilic organisms are phylogenetically separated from the kingdoms of the eubacteria and eukaryotes thus representing a third kingdom called `` '' archaebacteria '' '' .
C0029235
organisms
C0004611
eubacteria