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Evidence suggests that originally the Earth's atmosphere contained a large amount of carbon dioxide and almost no oxygen. Our atmosphere is different today: it contains a large amount of oxygen, which
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Evidence suggests that originally the Earth's atmosphere contained a large amount of carbon dioxide and almost no oxygen. Our

atmosphere is different today: it contains a large amount of oxygen, which is good, since we need it to breathe
What caused this atmospheric change?
A)
Global warming
B)
A meteor impact
C) Photosynthetic organisms like cyanobacteria taking in carbon dioxide and
releasing oxygen
D) Photosynthetic organisms like cyanobacteria taking in oxygen and
releasing carbon dioxide

User Jkm
by
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1 Answer

1 vote

Answer:

c

Step-by-step explanation:

i just did it on study island

User Bo Halim
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