List three important steps in the early development of life on earth?

- the protoplanet's collision with the earth forms the moon. (during the Hadean,   when earth was nothing but a hot ball of stone, life didn't excist yet).
- the first prokaryote life forms due to meteorite rains. Inside of these meteorites   are the elements needed to create this life (Archean).
- Eukaryotes, a more complex form of life, emerges during the Proterozoic due     to the excistens of oxygen in the sky, which is created by bacterias whom are     prokaryotic.

Ithink the dna sequences may vary but the amino acid sequences are identical.