The initial accumulation of oxygen in the atmosphere was the result of photosynthesis from an organism most like modern
A) algae.
B) mosses.
C) kelp.
D) eukaryotes.
E) cyanobacteria.

Question

Quizplus · Accepted Answer

The initial accumulation of oxygen in the Earth's atmosphere was due to the process of photosynthesis from cyanobacteria, also known as blue-green algae, which are the closest organisms to modern-day algae. The other options given (mosses, kelp, eukaryotes) were not the first organisms to release oxygen through photosynthesis.

The Initial Accumulation of Oxygen in the Atmosphere Was the Result