Classify each event in the history of life into the appropriate eon or era.
a- dinosaurs evolve and radiate
b- humans appear
c- oldest fossils of cells (prokaryotes) appear
d- origin of mammals
e- oldest fossils of eukaryotic cells appear
f- major radiation of pollinating insects
g- origin of Earth
h- first invertebrates appear
i- first tetrapods and insects appear
j- the Cambrian explosion
Hadean eon
Archaean eon
Proterozoic eon
Paleozoic era
Mesozoic era
Cenozoic era
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Classify each event in the history of life into the appropriate eon or era.
a- dinosaurs evolve an...
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