Answer: Archaea and Eubacteria
Archaea are similar to eubacteria that make it used to be classified as bacteria by the scientist.
Note that eukaryote(Eukarya) and eubacteria are different. Both eubacteria and archaea is a prokaryote, organism that doesn't have a membrane in their nucleus. Eukarya is the opposite of prokaryote, organism that has membrane-bound organelles.
