Need help here asap = Describe how some cells came to have chloroplasts, according to the theory of endosymbiosis.- just a 3to5 sentence keep it simple. THANKS!!!!

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anonymous · Answer

According to the theory of endosymbiosis, chloroplasts (and mitochondria in animal cells) were once free living prokaryotes. These were 'eaten' or 'engulfed' by eukaryotic cells but, instead of being digested, came to serve specialized functions within the eukaryotic cell and replicate with it. People who like this theory - most do - point to the fact that both chloroplasts and mitochondria still have some of their own DNA, possibly left from the days when they lived outside eukaryotic cells. Chloroplast resemble to photosynthetic bacteria, having same structure of genome and other proteins used to replicate,access genome. So it might be associated as endosybiotic after that it become essential component Mitochondria resemble to bacteriophage.... genome is similar to bacteria or bacteriophage As both genome can not distinguished by structure of genome. RNA polymerase used resemble to bacteriophage version. so it might be possible its infecting symbiotic bacteria and it eventually get accepted by cell as integral part