If we all had the same DNA that would mean we would all be the same, no differences <span />
The main reason why the testes are suspended within the scrotum is to provide cooler temperature for the testes and make it fertile for penetrating the egg. The Scrotum may contract or lengthen depending on the temperature of its surrounding.
Four ATP molecules are produced during the Krebs cycle. The final step of cellular respiration is the electron transport chain.