When and how was the first nucleas of life created...?

Question

When and how was the first nucleas of life created...?

Answer 1

The first Lifeforms and self-replicating RNA molecules may have evolved on earth around 4000 Ma during the Hadean Eon.

P.S. Oxygen did exist in the earth at this time however, it was about 80% oxygen not like it is today.

Answer 2

The first form of nuclei was blue-green algae. It lived in the bottom of the ocean, because there was no Ozone layer and there wasn't oxygen. The Earth at that time in the Pre-Cambrian Era was really hot. If any life lived on land on towards the top of the ocean they would get burnt from the dangerous Ultraviolet waves. Then later on, Oxygen came into existence and single celled live came on Earth. Oxygen came from the seas. Then came along the trilobites. Look at more information at the geological time scale in my sources. Hope I helped!!