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Which organisms were the earliest oxygen-producing life-forms? earth worms cyanobacteria mold Euglena
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3 votes
Which organisms were the earliest oxygen-producing life-forms?

earth worms

cyanobacteria

mold

Euglena

User LarsTech
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3 votes

Answer:

cyanobacteria

Step-by-step explanation:

just took the test

User Kittie
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