Question

Photosynthetic organisms were present when earth was primarily anoxic. why was the appearance of cyanobacteria critical for the oxidation of the atmosphere? view available hint(s) photosynthetic organisms were present when earth was primarily anoxic. why was the appearance of cyanobacteria critical for the oxidation of the atmosphere? the early forms of photosynthesis did not produce oxygen as a waste product. cyanobacteria carry out anoxic photosynthesis. the early forms of photosynthesis did produce oxygen, but it was not enough to make a difference in the atmosphere. the early forms of photosynthesis were carried out in the water, and there was no way for the oxygen to move into the atmosphere.

Answer 1

Cyanobacteria are the only organisms that use oxygenic photosynthesis. They were primarily responsible for the Great Oxidation Event, which resulted in the rapid oxygenation of the atmosphere. While other organisms were able to produce small amounts of oxygen through early photosynthesis, it was in water and insufficient quantities to make a difference in the atmosphere

Step-by-step explanation:

Answer 2

Cyanobacteria are the only organisms that use oxygenic photosynthesis. They were primarily responsible for the Great Oxidation Event, which resulted in the rapid oxygenation of the atmosphere. While other organisms were able to produce small amounts of oxygen through early photosynthesis, it was in water and insufficient quantities to make a difference in the atmosphere.