Photosynthesis, once it was planet-wide, changed the atmosphere of the Earth by introducing a significant amount of
A) oxygen
B) carbon dioxide
C) methane
D) ammonia
E) vibranium

Question

Quizplus · Accepted Answer

Photosynthesis is responsible for introducing oxygen into the atmosphere, which drastically changed the planet's environment and allowed for the evolution of aerobic organisms.

Photosynthesis, Once It Was Planet-Wide, Changed the Atmosphere of the Earth