Respuesta :
Endosymboitic theory refers to the symbiotic event between bacteria that led to the formation of organelles. This theory could be explained by the following simplified scenario: a big bacteria ate a smaller bacteria and let it live, this happened several times. Each time that happened the bigger bacteria sensed the benefits of eating the smaller bacteria withouth digesting it. Eventually (through millions of years) the smaller bacteria loss most of his autonomal characteristics, while only retained the ones that served th bigger bacteria, this lead to the formation of the first eukaryotes. A notable example supporting this hypothesis are mithocondria. Mithocondria is an organelle that has its own genomic information, and reproduces itself like bacteria, that is, by binary fission. Indeed, mithocondria genomic information shares many similarities with bacterial genomes, so it is considered strong evidence showing its bacterial (endosymbiotic) origin.
