Photosynthesis is Not Responsible For

Question

Photosynthesis is not responsible for
A) oxygen in the atmosphere.
B) the ozone layer.
C) most of the organic carbon on Earth's surface.
D) atmospheric CO₂.
E) fossil fuels.

Accepted Answer

Fossil fuels are formed from the remains of ancient organisms that lived millions of years ago. These organisms were not alive during the time when photosynthesis was the primary source of organic carbon on Earth's surface.