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OpenStudy (anonymous):
Which evolved during the Paleozoic Era? A. the first humans B. bacteria that could produce oxygen C. earth’s first land plants D. saber-toothed cats
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OpenStudy (micahm):
The Cambrian Period witnessed the most rapid and widespread diversification of life in Earth's history, known as the Cambrian explosion, in which most modern phyla first appeared. Fish, arthropods, amphibians and reptiles all evolved during the Paleozoic.
OpenStudy (luckycoins888):
C. earth’s first land plants
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