there is more than way to practice science, so there is not only one method to draw conclusions, in order to visualize and explain difficult concepts, a scientist may build a theoretical​

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?

the answer is na (sodium)

the answer would be a