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Animals are almost the same as human in energy transformations. They change food into thermal and mechanical energy. Due to this constant temperature is maintained in a body and animals are able to move.
Nutrients contain energy that is converted into free energy by an organism and made available to do work Distinguish between heterotrophs and autotrophs and give examples of each Heterotrophs, such as animals, must obtain organic molecules (food) from other organisms. Autotrophs, such as green plants, can make their own organic molecules using light energy and inorganic nutrients Describe two processes by which autotrophs extract energy from the environment Photo autotrophs use light energy to synthesize organic compounds from carbon dioxide and water in a process called photosynthesis.