Answer:
The earliest known life-forms are putative fossilized microorganisms, found in hydrothermal vent precipitates, that may have lived as early as 4.28 Gya (billion years ago), relatively soon after the oceans formed 4.41 Gya, and not long after the formation of the Earth 4.54 Gya.
If you don't have access to research articles at your school try Google scholar. https://scholar.google.com/
It would be best to ask a professional on the subject.
MRNA is the nucleic acid that moves it. I remember it well because the "m" in mRNA stands for messenger. It sends a message to the ribosome.
