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26-01-2016
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Which evolved during the Paleozoic Era?
a. earth’s first land plants
b. the first humans
c. bacteria that could produce oxygen
d. saber-toothed cats

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26-01-2016

c. bacteria that could produce oxygen

Which evolved during the Paleozoic Era?bacteria that could produce oxygen

NOT:
a. earth’s first land plants
b. the first humans
d. saber-toothed cats

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