Eco Evo Timeline Events
Order by
28 terms
Terms | Definitions |
|---|---|
origin of Earth | 4.6 bya |
oldest known Earth rocks | 4.2 bya |
oldest fossils of prokaryotes | 3.5 bya |
atmospheric oxygen increases | 2.7 bya |
oldest fossils of eukaryotes | 1.8 bya |
early multicelled organisms | 700 mya |
Cambrian Period (Paleozoic Era) begins | 542 mya |
early (jawless) fish | 490 mya |
early vascular (land) plants | 443 mya |
first insects and amphibians | 416 mya |
Pangaea begins to form | 355 mya |
first seed plants, origin of reptiles, amphibians abundant | 350 mya |
final assembly of Pangaea | 280 mya |
end of Permian (largest extinction), begin Mesozoic | 251 mya |
origin of mammals, cone-bearing plants (gymnosperms) dominate | 250 mya |
dinosaurs abundant | 200 mya |
birds appear | 180 mya |
flowering plants (angiosperms) appear | 145 mya |
dinosaurs become extinct, end of Mesozoic Era, beginning of Cenozoic Era (Paleogene) | 65 mya |
Alps form | 60 mya |
major radiation of mammals, early horses | 50 mya |
origin of primates (including apes) | 33 mya |
human ancestos appear, beginning of the Neogene | 23 mya |
origin of Homo | 5.3 mya |
first stone tools | 2.6 mya |
Neanderthals appear | 100,000 ya |
dogs first domesticated, diverge from wolves | 40,000 ya |
ice age, modern humans appear | 10,000 ya |
First Time Here?
Welcome to Quizlet, a fun, free place to study. Try these flashcards, find others to study, or make your own.