Mitochondria allowed who different energetic regimes and structures. Like the scaffold that allows multicellular organisms to even hold together simpler are not

Mitochondria allowed who different energetic regimes and structures. Like the scaffold that allows multicellular organisms to even hold together simpler are not possible (energetically) without mitochondria. It took the whole marriage of the two systems to allow the energy state (the "chemical reactions" as you say) to be possible SFI Complexity podcast has a few great episodes on this