The three stages of cellular respiration are glycolysis, krebs cycle, and the electron transport chain. when do cells exhibit all these stages?

Me with these questions image attached

Which best describes the nucleus of an atom a. it is where all of the particle s of the atom are located b. it is the negatively charged part of the atom c. it is where the electrons and the protons are located d. it is the part of the atom with the greatest mass

Which measure of an earthquake depends on how close you are to the focus?