Is this serious? you are asking who is the 1st? I didn't read all others answers, but If we come back with time we will find that evrything followed a complicated evolution but not chaotic evolution, before, there was a living kind that have a simple architecture, then to survive and to be able to move for exemple he was evoled, he got some fool legs (I am talking about microscopic creatures)..only the question is how there is a male and a female was evolued will make you wonder, I did pass a year in university studying Biology, and the 1st thing we study is the 1st aspect of life in the earth, when you will descover that the Mythocondrea living in you was a single creature, like any other, living alone, and don't really need us, and when you look at your hand and try to count the cells working to make you a humain.. we used to look at ourselves like a whole thing.. so I think that we should start by this, to know the answer, it's not difficult I have the answer, but not easy to me to explain
, I need to be a university teacher !!