The by-product of the metabolism of cyanobacteria that had the most effect on the further evolution of life is ____.
A) oxygen gas
B) carbon dioxide
C) water
D) nitrogen gas
E) hydrogen gas

Question

The by-product of the metabolism of cyanobacteria that had the most effect on the further evolution of life is ____.  
A) oxygen gas
B) carbon dioxide
C) water
D) nitrogen gas
E) hydrogen gas

Quizplus · Accepted Answer

The by-product of cyanobacteria metabolism that had the most significant effect on the further evolution of life is oxygen gas. Cyanobacteria were the first photosynthetic organisms to produce oxygen as a waste product during photosynthesis, which led to the eventual formation of the Earth's oxygen-rich atmosphere. The availability of oxygen allowed for the evolution of more complex organisms capable of aerobic respiration, leading to the diversity of life on Earth we see today.

The By-Product of the Metabolism of Cyanobacteria That Had the Most