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
atmosphere.
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

Answers

Another question on Biology

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