Energy from the sun or the solar energy is converted by the photosynthetic Cloze (1): JXUwMDI4JXUwMDAyJXUwMDFkJXUwMDBiJXUwMDExJXUwMDE2JXUwMDA2JXUwMDE3JXUwMDAx into Cloze (2): JXUwMDNiJXUwMDBiJXUwMDBkJXUwMDA4JXUwMDA0JXUwMDBhJXUwMDAyJXUwMDBk energy in the form of carbohydrates in plants. Primary consumers like the Cloze (3): JXUwMDMwJXUwMDBkJXUwMDE3JXUwMDEwJXUwMDBiJXUwMDFmJXUwMDE5JXUwMDFkJXUwMDE3JXUw MDE2 consume the plant carbohydrates and so the chemical energy is transferred to them. Herbivores are consumed by Cloze (4): JXUwMDNiJXUwMDAyJXUwMDEzJXUwMDFjJXUwMDA3JXUwMDFmJXUwMDE5JXUwMDFkJXUwMDE3JXUw MDE2 , so the energy is further transferred into the next Cloze (5): JXUwMDJjJXUwMDA2JXUwMDFkJXUwMDFmJXUwMDE4JXUwMDAxJXUwMDBh level. In these animals the chemical energy is used as Cloze (6): JXUwMDM1JXUwMDA4JXUwMDA2JXUwMDBiJXUwMDA5JXUwMDBmJXUwMDA3JXUwMDBhJXUwMDAyJXUw MDBkJXUwMDRjJXUwMDQ1JXUwMDBiJXUwMDBiJXUwMDE3JXUwMDE1JXUwMDFl and Cloze (7): JXUwMDMwJXUwMDBkJXUwMDA0JXUwMDE1 . The chemical energy in the food molecules is stored as ATP molecules. This stored energy is used by the body cells for synthesis of new chemical compounds and for mechanical work. Energy used at each trophic level, only 10% of it is transferred to the next trophic level. At the last trophic level, that is with the decomposer no energy is left for recycling. Hence, energy flow from Cloze (8): JXUwMDJiJXUwMDA2JXUwMDFi to the producers to consumers is in a single direction only.