Dna to rna to protein transfer of info. All are descendants from a common ancestor. Why do they all have dna, ribosomes. It was the last known ancestor of early life. Luca is the organism that survived as it had the necessary characteristics to survive and make the 3 domains. Similar in each sequence, but different sequence in each domain. Prokaryotes: anything that is in that group is evolutionarily related, but the tree shows not possible, as bac and arc are distinct and not evolutionarily related. Pro before, prokaryote before nucleus, nucleus is derived from a cell that didn"t"t have one! Allow bac and arch to be in very extreme environments, can adapt naturally to any environment extremophiles. Before cells, amnio acids and stuff produced by chemistry of the earth. How do you go from monomers to polymers. Ingested changes the chiral form and causes problems.