One problem with the endosymbiotic hypothesis is that endophagocytosis is not observed among existing prokaryotes.
One problem with the endosymbiotic hypothesis is that endophagocytosis is not observed among existing prokaryotes.
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Alternate hypotheses are that eukaryotic and prokaryotic cells were simply [[intelligent design|design]]ed as they are. This is, of course, like the endosymbiotic hypothesis, neither [[theory|testable]] nor [[falsifiable]].
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Alternate hypotheses are that eukaryotic and prokaryotic cells were simply [[intelligent design|design]]ed as they are. This, unlike the endosymbiotic hypothesis, is neither [[theory|testable]] nor [[falsifiable]], though it is consistent with other creation models which creationists claim are falsifiable.