Which were the first organisms to release oxygen by photosynthesis?
A) algae
B) cyanobacteria
C) gymnosperms
D) flowering plants
E) green sulfur bacteria

Name: Which were the first organisms to release oxygen by photosynthesis? A) algae B) cyanobacteria C) gymnosperms D) flowering plants E) green sulfur bacteria
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Question

Quizplus · Accepted Answer

Cyanobacteria were the first organisms to perform oxygenic photosynthesis, releasing oxygen as a byproduct, which significantly contributed to the oxygenation of Earth's atmosphere.

Which Were the First Organisms to Release Oxygen by Photosynthesis