@just_me_karen wrote: Water, air, sunshine and food. Do I get a prize?
As I said the more you type the more you are exposed as having no idea.The question was what kept them alive as their vital organs evolved.Water air and sunshine are useless if the vital organs needed to process those things as a life sustainer have not yet evolved.TRY AGAIN!This time maybe think a bit first.
When you were an amoeba, you didn't have a brain or a heart...but air, water, sunshine and pond sludge kept you alive...and slowly you evolved...I think...
