From Plazma Inferno: A new study may have found an answer to one of the big mysteries of cell biology. Scientists think that mitochondria were once independent single-celled organisms until, more than a billion years ago, they were swallowed by larger cells. Instead of being digested, they settled down and developed a mutually beneficial relationship developed with their hosts that eventually enabled the rise of more complex life, like today’s plants and animals. http://www.sciencemag.org/news/2016/02/why-do-our-cell-s-power-plants-have-their-own-dna A step forward endosymbiont theory? One problem with this theory is the question, why did it the mitochondria settle as parters and not use the cell as source of materials, so it can dominate the cell? The cell has its own way to make energy molecules which makes it easier for the mitochondria. The cell can also use its products, allowing the mitochondria to push reactions forward, easier. The accept theory is pseudo-science, done by consensus. How do you prove this claim, and what is the logic other than the mitochondria randomly won a lottery, and they and the cell ironed out a treaty where the mitochondria would limit itself to symbiosis. Evolution allows insider pseudo-science. A more rational answer is connected to chemical equilibrium in water.