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7 July, 12:44

List the four eras on the geologic time scale describe one identifying type of organism from each era

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  1. 7 July, 12:57
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    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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