They classify on how they reproduce.
Prokaryotic Cells
Hope this Helps! :D
Mutation can cause DNA to change
Do not worry so much about the why of classification. Classification is important because it is a lens through which to see what is there. It is not intrinsically true in and of itself. Distinctions are important only as vehicles for a common base of communication. All things have symmetry. A reflection has symmetry. Symmetry means organized life. Organized life is what happens when RNA replicates. It is the difference between chaos and order
Catalyst reduce the activation energy barrier between reactants and products.
