Freebase(0.00 / 0 votes)Rate this definition: Arbol is a programming language which has been primarily developed for use in Genetic Programming experiments. It is a functional programming language inspired by the ideas of other small and esoteric languages.
Causes. In most cases of colon or rectal cancers, the cause or causes are unknown. Defects in genes that normally protect against cancer play the major role in causing polyp cells to continuously change and become cancerous.
Answer 3: Cancer results when a cell that is not growing suddenly decides to grow out of control and form a tumor. The way in which cancer kills varies, depending on what is affected. The most lethal cancers are those that are metastatic, where a single cell breaks off, migrates and starts a new tumor.