Biology
Lilydelgato
2016-09-27 16:43:06
List the four eras on the geologic time scale describe one identifying type of organism from each era
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mollypushpa
2016-09-27 20:44:38

The four main time scales, starting from the earliest, are: Precambrian- This era consisted of single-celled organisms and multicellular organisms also began to arise in this time period. Paleozoic- The early part of this era primarily had fish and the latter part of the era consisted of amphibians and reptiles. Mesozoic- The mesozoic era had dinosaurs, birds and some flowering plants Cenozoic- Many dinosaur species had gone extinct and this era contains mammals.

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