This was postulated by Lynn Margulis in the early 1970s, it is now supported by extensive evidence, including the circularity of DNA in bacteria and the mitochondrial ribosome's similarity to that of the bacterium.
This was postulated by Lynn Margulis in the early 1970s, it is now supported by extensive evidence, including the circularity of DNA in bacteria and the mitochondrial ribosome's similarity to that of the bacterium. The second membrane surrounding both the chloroplast and mitochondrion is probably formed from a plasma membrane, showing that there may have been a relationship in which one species lived inside another. For ten points, name this theory arguing that eukaryotic cells formed from the mutualistic absorption of prokaryotes.
This was postulated by Lynn Margulis in the early 1970s, it is now supported by extensive evidence, including the circularity of DNA in bacteria and the mitochondrial ribosome's similarity to that of the bacterium.
{endosymbiont} (or {endosymbiosis} or {endosymbiotic} hypothesis; accept other clear knowledge equivalents)