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Does Lynn Margulis’s endosymbiosis story resolve evolution’s deep problems? Apparently its resolution of the prokaryote-eukaryote transition is far from secure. The paper below notes that with advances in research “the evolutionary gap between prokaryotes and eukaryotes is now deeper.”
Eukaryotic evolution, changes and challenges
T. Martin Embley and William Martin
Nature 440, 623-630 (30 March 2006) | doi:10.1038/nature04546Abstract: The idea that some eukaryotes primitively lacked mitochondria and were true
intermediates in the prokaryote-to-eukaryote transition was an exciting prospect. It
spawned major advances in understanding anaerobic and parasitic eukaryotes and those with
previously overlooked mitochondria. But the evolutionary gap between prokaryotes and
eukaryotes is now deeper, and the nature of the host that acquired the mitochondrion more
obscure, than ever before.