Chaper 26: Tree of Life
Terms
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- 2 theories for mass extinction?
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permian age- no O2 thick air
crustacean- asterioid wipe out, iridium - era, eons, epochs
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archean, proterozoic, phanerozoic
paleogene, neogene,
mesozoic, cenzoic, proterozoic - stromatolites
- rocklike structure composed of bacteria in bays, shallow H2O
- how did prokaryotes evolve?
-
electron transport chain
oxygen revolution
autotrophs -> heterotrophs - oxygen revolution
- 10% increase, O2 + iron = irone ore -> dissolved = lots of O2
- 1st eukaryotes?
- endosymbiosis with mitochondria
- serial endosymbiosis
- says mitochondria evolved befoer plastids
- SSU-rRNA
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smallest subnits of ribosomes in all organims
alphobacteria = mitochondria
cyanobacteria = plastids - chimera
- made from diff parts
- genetic annealing
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horizontal gene transfers between diff bacterial and archean lineages
you are what you eat - snowball earth hypothesis
- ice age, glaciers around, and parts where enough parts melted were organisms + eukaryotes
- Pangea
- supercontinent
- 2 phylas in cambrian age?
- porfira + cnidaria