Some archaeans are methanogens. Archaean diversity evolved before Eubacterial diversity . Some archaeans can inhabit high concentrations of salt solutions. Some archaeans can live in water above the boiling point. Only eukaryotic organisms have membrane-enclosed organelles.
Molecular data show that archaebacteria and eukaryotes share a more recent common ancestor.
Structural data show that eubacteria are more closely related to protists. Only prokaryotic organisms show growth inhibition in the presence of antibiotics. Eubacteria are thought to be more closely related to eukaryotes than archaebacteria. Both B. and C. 5. The statements above are all true.