The conversion of earths atmosphere from anerobic to aerobic was due to the development of _________________ by cyanobacteria.
A) Photosynthesis
B) Metabolism
C) Chemosynthesis
D) Oxidation of iron
E) Fixation of nitrogen as cyanide

Question

Quizplus · Accepted Answer

Cyanobacteria developed the process of photosynthesis, which produces oxygen as a byproduct. This significant biological development led to the conversion of Earth's atmosphere from an anaerobic (lacking oxygen) to an aerobic (oxygen-rich) environment.

The Conversion of Earths Atmosphere from Anerobic to Aerobic Was