- Eukaryotic cells - presence of internal membranes and organelles - lacking in bacteria and archaea.
- Suggested that to 2 membranes that chloroplasts contain derive from the endosymbiotic procedure itself:
- the inner membrane derives from the prokaryote ancestor.
- the outer membrance derives from the vacuolar membrane of the eukaryotic cell which was involved in engulfing the endosymbiont.
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- Ancestral Eukaryotic cell engulfs an aerobic bacterium (mitochondria).
- It then engulfs a photosynthetic bacterium to form endosymbiosis to form plant cells.
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Ivan Wallin proposed that mitochondria may have be
- Mitochondria and chloroplasts are similar in size and morphology to prokaryotes.
- Both reproduce by binary fission as do bacteria.
- Organelles can only arise from pre exsisting organelles.
- Mitochondria and chloroplasts have their own DNA.
- Organellular DNA resembles those of bacteria (DNA phylogeny)
- Organelles contain their own ribosomes.
- Differences in the composition of the 2 membranes.
- Organelles can be targetted by antibiotics specific to prokaryotes.
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