Which group of prokaryotes was responsible for converting Earth's early atmosphere from anaerobic to aerobic?
A) Proteobacteria
B) Halophiles
C) Cyanobacteria
D) Spirochetes
E) Actinobacteria

Question

Quizplus · Accepted Answer

Cyanobacteria, also called blue-green algae, were the first prokaryotes to evolve photosynthesis, converting the Earth's early anaerobic atmosphere to an oxygen-rich atmosphere through the release of oxygen as a byproduct of photosynthesis. This was a critical step that allowed for the evolution of eukaryotic organisms and ultimately led to the development of complex multicellular life.

Which Group of Prokaryotes Was Responsible for Converting Earth's Early