•Reproduce themselves only when and where they are needed.
•Stick together in the right place in the body or freely floating.
•Self destruct if they are damaged or too old. 
•Become specialized (mature).
•Continuously grow and divide (No G0 Phase).
•Ignore chemical signals from other cells.
•Don’t need to stick together-ability to spread throughout body.
•No specialization, repair or death of cancer cells.