Biology, 20.05.2021 18:10 ashtonbillups

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

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Another question on Biology

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