4. We have 2 copies of each of our genes. (a) In terms of an oncogene, how many of these 2 copies need to be defective for it to cause cancer? (b) How does this contrast with tumor suppressor genes?

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds