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OpenStudy (anonymous):
Which happened during the Paleozoic era? A. Bony fish evolved. B. No life was present yet on earth. C. Sponges and invertebrates dominated the seas. D. Bacteria were the dominant life-forms.
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OpenStudy (anonymous):
@LeeEtchison
OpenStudy (anonymous):
@leonardo0430
OpenStudy (anonymous):
Medal who is correct and knows the answer
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