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Earth Science Regents Review Flashcards | StudBud
Earth Science Regents Review
1 / 30
Scientists infer that oxygen in Earth’s atmospheredid
not
exist in large quantities until after
A
the initial opening of the Atlantic Ocean
B
the first multicellular, soft-bodied organisms appeared
C
the first sexually reproducing organismsappeared on Earth
D
photosynthetic cyanobacteria evolved inEarth’s oceans
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