In electron transport chain, the multiprotein structure pumps out H+ ions into the intermembrane space. As the H+ ions get pumped out, the concentration of H+ in the intermembrane space gets higher. As a result, H+ ions will start flowing down back to the chromosomes matrix through the ATP molecule.
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Evolution reflects the adaptations of organisms to their changing environments and can result in altered genes, novel traits, and new species. One mechanism that drives evolution is natural selection, which is a process that increases the frequency of advantageous alleles in a population.
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If the shape of this unknown skull is long and skinny at the cheekbones, then it is most likely an Australopithecus afarensis one
