Any living organism relies on an external source of energyradiation from the Sun in the case of green plants, chemical energy in some form in the case of animalsto be able to grow and reproduce. The daily 15002000 Calories (68 MJ) recommended for a human adult are taken as a combination of oxygen and food molecules, the latter mostly carbohydrates and fats, of which glucose (C6H12O6) and stearin (C57H110O6) are convenient examples. The food molecules are oxidised to carbon dioxide and water in the mitochondria
How many daily calories are recommended for a human adult?
15002000