A drawing may be a fast way to deal with some of these questions. Name three gases that were abundant in the early atmosphere.
Amino acids are the basic building blocks of proteins.
Describe one process that could have formed amino acids on the early Earth, or in the laboratory, or anywhere else for that matter. Give one possible reason why organisms would evolve sexual reproduction. Draw one of them. You don't have to name it, but I have to be able to recognize it. If naming it will help, then do so.