Evolution of Sameness and Difference

An analysis of the problem of how the sameness and difference in living things are controlled normally, in the course of development and maintenance, and abnormally, in the course of defective growth, tumours and cancer. Like everything else in life, the biological sameness and difference in organisms has evolved. An understanding of this biological evolution will help control abnormalities, such as those associated with birth defects and invasive, destructive tumours.