Which of the following is not part of the cell theory? a. all living things are made of one or more cells b. all cells contain the same structures. c. cells are the basic units of structure and function in organisms. d. all cells arise from existing cells.

What do isotopes of uranium have the same number of? what do they have a different number of? a) same number of protons; different number of electrons b) same number of protons; different number of neutrons c) same number of electrons; different number of protons d) same number of neutrons; different number of protons