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OpenStudy (anonymous):
IGIVE MEDALS The types of organisms living on Earth have changed significantly over time due to various factors. What important event occurred during the creation of the ozone layer? a. the evolution of multicellular life c. the breakup of Pangaea b. the evolution of photosynthetic prokaryotes d. the evolution of eukaryotes
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OpenStudy (anonymous):
I don't know if you mean to put (A,C,B,D) but if you did then its B
OpenStudy (anonymous):
@MikeLemus
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