Classify each event in the history of life into the appropriate eon or era.

Classify each event in the history of life into the appropriate eon or era.  Drag each phrase to the appropriate bin.  The age of fossils can sometimes be determined by radiometric dating, which is based on the constant rate of decay of radioactive isotopes. The time required for half of a radioactive Classify each event in the history of life into the appropriate eon or era. Drag each phrase to the appropriate bin. The age of fossils can sometimes be determined by radiometric dating, which is based on the constant rate of decay of radioactive isotopes. The time required for half of a radioactive

The following events are classified into appropriate era
or eon
Hadean eon – Origin of earth
Archaean eon – Oldest fossils of cells (prokaryotes)
appear.
Proterozoic eon – Oldest
fossils of eukaryotic cells appear.
Paleozoic era – The cambrian explosion, First tetrapods
and insects appear.
Mesozoic era – Dinosaurs evolve and radiate, Origin of
mammals.
Cenozoic era – Humans appaer, Major radiation of
pollinating insects.

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