The membrane lipids of its members are ether-linked, and, like Gram-positive bacteria, members of it also lack peptidoglycan in their cell walls.  
Immunity to kanamycin and chloramphenicol is a characteristic of this group of organisms, whose ribosomes are sensitive to diphtheria toxin. The membrane lipids of its members are ether-linked, and, like Gram-positive bacteria, members of it also lack peptidoglycan in their cell walls.  Containing groups known as halophiles, thermoacidophiles, and methanogens, this group of organisms was recently given a name coined by George Fox and Carl Woese. FTP, name this domain of organisms distinct from Eubacteria, often considered the oldest form of life on Earth.
Immunity to kanamycin and chloramphenicol is a characteristic of this group of organisms, whose ribosomes are sensitive to diphtheria toxin.
Archaea or Archaebacteria