11. Autotrophs flow of energy and nutrients from a productive base of self-feeding autotrophs . 12. Phototrophs can be either autotrophs or heterotrophs. 13. They discover that the Autotroph plans to leave the planet and warn its race about the weapon. 14. Being an autotroph it receives energy from growing on sulfur or even a variety of organic compounds. 15. Heterotrophs function as consumers in food chains : they obtain organic carbon by eating autotrophs or other heterotrophs. 16. Autotrophs are organisms that produce their own food ( production is greater than respiration ) by photosynthesis or chemosynthesis.17. Some animals, such as corals, form symbiotic relationships with autotrophs and obtain organic carbon in this way. 18. Ecologists can broadly group all life forms into one of two trophic layers, the autotrophs and the heterotrophs. 19. As autotrophs , phytoplankton abundance is strongly influenced by the concentration of inorganic nutrients, such as nitrogenous compounds. 20. Other organisms, called heterotrophs, take in autotrophs as food to carry out functions necessary for their life.
