Hhow do you some cells become brain cells and others become skin cells when the dna and all the cells is exactly the same in other words if the instructions are exactly the same how does one so i'll become a brain cell in another a skin cell?

google my dude. if it doesn't show up ask me.

i need an image of the diagram

sorry to break it to ya but no one can answer your question it's just

jk but i am serious about the part that most people cant answer it beacuse you did not mention the section you are talking about. but it would if you added some detail and were a bit more specific.

i think the answer is composed of atoms