So mutation and natural selection occur. No evidence, based on the scientific method, for those mechanisms producing anything but like life forms. Bacteria produce bacteria, finches produce finches, moths produce moths.
The genetic evidence of common descent has been pointed out to you over and over. There is very strong evidence in the genetic record that (e.g.) plants such as a pine tree and animals such as humans evolved from a common ancestor. E.g. ubiquitous genes.
I post the image in an attempt to help you understand the scientific method. It would behoove you to review it again.
What part of the scientific method is it that you are following when you stick your head in the sand and refuse to acknowledge the mountains of evidence given to you? Here's a Jeopardy style answer for you to find a question for. 'One sticks their head in the sand and pretends that if it can't see something, it doesn't exist. The other is an ostrich.'
Same thing as HOW, by what process, were pine trees and humans produced from an alleged single life form of long ago.
Answer: Evolution.
What is it about this answer that you do not understand?
That's not an answer, that's simply a meaningless word until you describe the process.
Words have meaning. If had posted the word 'Glaggagumphalink' as an answer, then it would have no meaning. The word 'evolution' in English has a deep meaning, and you can find out more about it if you do a bit of research.
The problem is not in my one word answer, the problem is in your lack of engagement with the correct answer to your question. If you don't understand my answer, well then I wonder what you think you will be able to achieve debating evolution if you don't know what it is. Try here:
http://science.howstuffworks.com/life/evolution/evolution.htm for a start, though the Richard Dawkins book will give you a better understanding as well as a good summary of the evidence that evolution did occur.
Sorry, links and book titles aren't evidence.
The information contained in them includes very large amounts of evidence. If you refuse to look at them, that doesn't in any way discount the information contain therein.
Unable to simply discuss the issue, are you?
As can be seen in this post, yes I can simply and reasonably discuss the issue.