Which statement about reaction rates is true? (a)changing the temperature cannot speed up a reaction rate. (b)changing the amount of reactants will not change the reaction rate. (c)changing the surface area affects the reaction rate. (d)a catalyst slows down the reaction rate.

(C)Changing the surface area affects the reaction rate.

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? ?

bcde is the incorrect answer it is a