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OpenStudy (anonymous):
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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OpenStudy (anonymous):
Halp!
OpenStudy (truwhovian11):
A. the first land plants
OpenStudy (misssmartiez):
http://www.ucmp.berkeley.edu/help/timeform.php It has helped me with my portfolio due to the geologic time scales, and it has that era included.
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