Biology, 28.06.2019 00:30, jbk123

Starting billions of years ago, algae lowered the
atmosphere.
levels in the
a. oxygen
b. ozone
c. carbon dioxide
d. methane

Answers: 2

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Starting billions of years ago, algae lowered the
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levels in the
a. oxy...

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Starting billions of years ago, algae lowered the atmosphere. levels in the a. oxygen b. ozone c. carbon dioxide d. methane

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Other questions on the subject: Biology

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Starting billions of years ago, algae lowered the
atmosphere.
levels in the
a. oxygen
b. ozone
c. carbon dioxide
d. methane