An early consequence of the release of oxygen gas by plant and bacterial photosynthesis was to?
A) change the atmosphere from oxidizing to reducing
B) make it easier to maintain reduced molecules
C) cause iron in ocean water and terrestrial rocks to rust (oxidize)
D) prevent the formation of an ozone layer

Question

Quizplus · Accepted Answer

The release of oxygen by photosynthesis led to the oxidation of iron in ocean water and terrestrial rocks, a process commonly referred to as "rusting." This is because oxygen is a highly reactive molecule that readily reacts with many elements, including iron, to form oxides.

An Early Consequence of the Release of Oxygen Gas by Plant