The first living things on Earth, single-celled micro-organisms or microbes lacking a cell nucleus or cell membrane known as prokaryotes, seem to have first appeared on Earth almost four billion years ago, just a few hundred million years after the formation of the Earth itself.
The answer is called monoclonal. Hope this helps and please don't forget to thank me.
I also think it should be B
The trees dont take in co2 cause there are none cutting off the oxygen cycle
