Arguments Against Endosymbiotic Theory

Endosymbiotic theory states that organelles were once prokaryotic cells, living as a part larger cells. The prokaryotic cells may initially have been parasites or an intended meal for the cell. Whatever the cause, those prokaryotes would soon become cooperative prisoners. The prokaryotic cells would soon provide crucial nutrients or even to maximize oxygen usage for transforming energy. The prokaryotic cells, in return, would get protection and a constant environment to live. A lot of evidence exists which supports the theory of endosymbiosis and that evidence, although a lot, is still argued against.

A lot of evidence has been shown to support the endosymbiotic theory. For example, Endosymbiosis has been observed in many fields of biology.