it is so because instead of producing energy in the form of ATP, Mitochondria also helps in cellular respiration. The multi-compartment structure of the mitochondrion is useful for respiration as it allows the separation between different kind of reactions. It also helps in maintaining the concentration of different molecules in its multi compartments.
Explanation: because it mutation can help or not help in many ways think of a mocking bird if its beck was short it would have a less chance of surviving. if the mockingbird had a longer beck it would surviving .This leads up to natural selection.
