kenKeisehearhn kenKeisehearhn

16-12-2016
Biology

Answered

Which of the following organisms first introduced oxygen into Earth's atmosphere?

Acyanobacteria
Bmethanogens
Cearly protozoans
Dplants
Egreen algae

Verified Answer :

EclipsedStar EclipsedStar

16-12-2016

Cyanobacteria were the first organisms to introduce oxygen into Earth's atmosphere. They were also known as blue-green algae, and is estimated that they first appeared around 3 billion years ago.

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