History of Life

evolve subsequently a cyanobacterium is engulfed

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Unformatted text preview: ster to Archaea Eukaryotes and archaea form a monophyletic group Eukaryogenesis Canonical version of events A prokaryote evlves such features as a nucleus and membranes, etc. Then a bacterium is engulfed to form the mitochondrion; cyanobacteria are engulfed later to make photosynthetic eukaryotes A modern take An archaean and a proteobacterium sat side by side in a syntrophic metabolic relationship: one produces hydrogen by fermentation, the other consumes hydrogen The proteobacterium becomes engulfed This proteobacterium is a facultative aerobe mitochondrion All other features of the eukaryotic cell (nucleus, membranes, etc.) evolve subsequently; a cyanobacterium is engulfed later to make a photosynthetic eukaryote. Eukaryotes The organelles were once free- living The last e...
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This document was uploaded on 03/23/2014 for the course BIOL 185 at Georgetown.

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