EAS100 Lecture Notes - Lecture 28: Cambrian Explosion, Gymnosperm, Flowering Plant

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November 26 2014
ESB 3-27
Prokaryotes 3.5bil
Eukaryotes 1.5bil
possibly emerged from combination of Prokaryotes
Cambrian explosion happened in water!
Plant life on land
1) support structure: woody tissue
2) Internal aquatic enviroment: internal channels
3)
Seedless: dump spores
Gymnosperms: cones / dump-sperm
Angiosperms: flowers / pollinations
Animal life on land
Invertebrates
Vertebrates
Fish
Amphibians
Reptiles
Mammals
Extinction events tend to be followed by periods of rapid change
adaptive radiation
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