If there was a sudden drop in temperature after the evolution of the first living cells, predict how that might have affected the changes in the atmosphere and the evolution of cyanobacteria and other autotrophs. explain your answer.

Sudden changes in the temperatures and sudden drop in pressure conditions led to how we see the present present atmosphere and suggest the evolution of cyanobacteria.

Explanation:

During the earth's primitive stages, the planet was devoid of oxygen and had an unstable atmosphere mostly composed of natural or greenhouse gases. These gases tended to be blown out from the center due to the weak gravitational pull of the earth and blown away from the sun's solar storms. When the atmosphere cooled and temperatures dropped to the point where the dust started to from and after which the multi-celled life emerged from the oceans in form of blue-green algae as cyanobacteria that did not need oxygen and used carbon and present gases to build up oxygen. Which further set the ground for the evolution of other autotrophs and planets of vascular nature.

When you are making a guess you are forming a hypothesis