Respuesta :
Without oxygen, organisms can just split glucose into two molecules of pyruvate. ... With oxygen, organisms can break down glucose all the way to carbon dioxide. This releases enough energy to produce up to 38 ATP molecules. Thus, aerobicrespiration releases much more energy than anaerobic respiration. thats what Respiration to generate engery is
According to Reference .com, "Unicellular microorganisms, called obligate anaerobes, strictly use anaerobic respiration for energy production. Common examples of obligate anaerobes are some species of bacteria, such as Clostridium tetani, Clostridium botulinum,Clostridium perfringens, Clostridium sporogenes and Clostridium difficile."