Doctors can perform tests called biopsies to determine whether cells in an area of tissue are cancerous or not. Cells are removed from the area, sometimes by a punch biopsy, and then viewed under a microscope. Based on what you know about the regulation of cell growth, make a list of questions you would ask as you observe the cells.

What lets you know that the cells are cancerous?

How can you know its only in that area of the body?

How can you tell if they are or  are not cancerous?

Can you tell if its any other disease?

Hope this helps

answer; /// i believe that the correct answer is (50%);

when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.