My mistake : I meant Eukaryote not multicellular. Archea are less related to bacteria that we thought some years ago. They are as different from bacteria that

My mistake : I meant Eukaryote not multicellular. Archea are less related to bacteria that we thought some years ago. They are as different from bacteria that eukaryotes are different from bacteria. So a new branch of life is justified here since the basic parts of the cell are differents.