Evolution theory

What i gotta talk about is about cell in our body, in the beginning, we are tiny cell organism created, but in order to survive, the cell evolve in order to let itself live on. The stage of evolution i not going talk muz, coz it is quite boring, juz jump straight into from ape to human. As homosaipen, apeman is strongly in-bulit in the beginning, but when time passes or rather our cell go to focus on another part of body, brain, as since the cell is very focus on evolve one function of the body, the physical strength is forsaken so human can become weaker. Nor neither you can alter the cell to grow toward strength, unless u bring out the need, the need for survival, which usually intelligence is the key to survival...well is sound like the selection theory, well I have to read on that theory so i dunoe whether i have inflict copyright....