Photosynthesis is the primary chemical reaction that creates the oxygen found on the earth.Some prokaryotic organisms and some eukaryotic organisms can produce oxygen through photosynthesis.While all eukaryotic cells and many prokaryotic cells also require oxygen,there are many prokaryotic cells that do not.What then created the oxygen in the earth's atmosphere that allowed the earliest eukaryotic organisms to evolve?

Question

Quizplus · Accepted Answer

The earliest oxygen production in the earth's atmosphere was done by photosynthetic bacteria, which allowed for the evolution of eukaryotic organisms. While photosynthetic plants and algae also produce oxygen, they evolved later in the history of life on earth. Volcanoes release gases, but not enough oxygen gas to significantly affect the composition of the atmosphere.

Photosynthesis Is the Primary Chemical Reaction That Creates the Oxygen