What are the three parts of modern cell theory. Choose all that apply. A.) The cell is the smallest living unit in organisms

B.) All cells come from other pre-existing cells

C.) All living things are made of cells

D.) All organisms are multicellular

Which change will decrease the number of effective collisions during a chemical reaction? a. adding a catalyst b. increasing the surface area c. decreasing the temperature d. increasing the reactant concentrations e. increasing the volume of the reactants