Oxygen released by ____ accumulated in early Earth's atmosphere and produced the ozone layer.
A)archaeans
B)aerobic bacteria
C)cyanobacteria
D)early eukaryotes
E)protocells

Question

Quizplus · Accepted Answer

Cyanobacteria, also known as blue-green algae, are responsible for producing the first oxygen on Earth through photosynthesis. This oxygen eventually accumulated in the atmosphere and led to the formation of the ozone layer.

Oxygen Released by ____ Accumulated in Early Earth's Atmosphere and Produced