Humans engineer stem cells' genome to produce specific tissue, in this case gut lining, and guess what, the cells produce what is expected. Thus we see how tightly controlled is the product of the genome:-http://www.sciencedaily.com/releases/2014/10/141019151800.htm-That is not the point of the paper, but it also makes the point that we can make life only from life. It is a closed system.