What does it mean that a hypothesis must be ‘falsifiable’ in order to be valid? A. It must have the ability to be proven wrong by some test.
B. It must be wrong the first time, or you did not learn anything.
C. It cannot be wrong, or the experiment would be pointless.
D. It must conform to experimental standards.

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? ?

i do not get it   at all