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What evidence BEST supports the presence of atmospheric oxygen 2.7 billion years ago? a. carbon 14 in plants b. fossils found in stomatolites c. layered iron rust in rocks
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What evidence BEST supports the presence of atmospheric oxygen 2.7 billion years ago?

a. carbon 14 in plants
b. fossils found in stomatolites
c. layered iron rust in rocks

User Tomaz Fernandes
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1 Answer

6 votes

Answer:c

Explanation:layered iron rust in rocks

User Ddewaele
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