Biosynthesis of proteins and nucleic acid require nitrogen however atmospheric nitrogen is not available to eukaryotes for organic synthesis. Only few prokaryotes (such as...
The traditional grouping of life forms into prokaryotes and eukaryotes was revised in 1977 when rRNA sequence characterisation revealed that archaea (then called 'archaebacteria')...
Thiomargarita magnifica shows presence of prokaryotic phylogenetic marker 16S rRN. If it were a eukaryote, the phylogenetic typing would reveal presence of 18S rRNA gene sequence...