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| an organism that can make its own food by using energy from its surroundings. |
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| an organism that eats other organisms or organic matter. |
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| an organism that gets energy by breaking down the remains of dead organisms or animal wastes and consuming or absorbing the nutrients. |
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| a molecule that is made up of amino acids and that is needed to build and repair body structures and to regulate processes in the body. |
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| a class of energy-giving nutrients that includes sugars, starches, and fiber; contains carbon, hydrogen, and oxygen. |
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| a type of biochemical that does not dissolve in water; fats and steroids are lipids. |
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| a lipid that contains phosphorous and that is a structural component in cell membranes. |
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| adenosine triphosphate, a molecule that acts as the main energy source for cell processes. |
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| a molecule made up of subunits called nucleotides. |
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