Which type of organisms developed first due to the early environmental conditions on earth?

The first
cells are thought to have been similar to Archaea of today. Archaea is a group of single-celled
prokaryotic cells. Being prokaryotic, Archaea lack a nucleus and other membrane-bound organelles
that are characteristic of more developed eukaryotic cells. Archaea are able to live in extreme
environments. Halophiles are a group of Archaea that are able live in extremely salty
environments. Thermophiles are a group Archaea that are able to live in extremely hot
temperatures. Because Archaea are primitive in structure and are able to survive in such harsh
environments, they are thought to resemble the cells that developed during Earths extreme and
prehistoric conditions.

The first cell is thought to have developed 3.8
billion years ago. At that time, Earth had little free oxygen in its . Instead, the atmosphere
was mainly composed of carbon dioxide and nitrogen. Other trace gases were also present such as
hydrogen, hydrogen sulfide, and carbon monoxide. The presence of carbon dioxide is thought to
have made any water that was present fairly acidic. The temperature is suspected to have been
much hotter than it is today. Therefore, cells could have that developed during such a time
would have needed to be able to sustain such conditions.

href="https://www.britannica.com/science/archaea">https://www.britannica.com/science/archaea
href="https://www.ncbi.nlm.nih.gov/books/NBK9841/">https://www.ncbi.nlm.nih.gov/books/NBK9841/