unkown211
unkown211 unkown211
  • 11-04-2018
  • Biology
contestada

please help ( earth science )

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graysamathecat
graysamathecat graysamathecat
  • 11-04-2018
i’m not sure what you’re asking for
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ecallejas131 ecallejas131
  • 11-04-2018
1. formation of the solar system
2. toxic atmosphere; first bacteria
3. buildup of oxygen; first eukaryotes
4. current eon in Earth's history
5. time of the dinosaurs
6. largest mass extinction in Earth's history
7. Sometimes called age of mammals 

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