Is everything made of the same material?

Hello everybody, this is my first post! I’m a little nervous! I have a question about evolution and how it occurs. Having had very little biological education in the past - my biology class consisted of reading a textbook, filling out a worksheet, and then discussing football and movies - I hope I can educate myself at this site. I’ll try to take the position as a student.Let’s start at the beginning of life, with an organism called “X”. Theoretically, you can take the genetic material of X and mutate it, eventually forming a redwood tree, or a dog. This would take billions of years, and it would involve artificial selection instead of natural selection. It would also be improbable due to human constraints, but it's possible.My question may sound stupid, but here it is: If you start out with X, and you end with a redwood tree, where did all that material come from? How can you go from X to bark and leaves and branches, etc.? Surely trees and bacteria aren’t made of the same material?I think I have an explanation: Even the bark and the leaves are “planned” by DNA strands, and these strands can order the organism to gather materials. So DNA may be like the boss telling his employees to gather the buns and meat and fry a hamburger. He doesn’t contain the materials, but he gives orders to gather them. Is this on the right track?Thanks for any help!!