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Bio Vocab 5 Levels of Organization

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Term
Definition
carbohydrates   that main source of energy and structural support (sugars)  
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lipids   macromolecule that stores energy and are hydrophobic (fats)  
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nucleic acids   macromolecule that stores and transmits genetic information (DNA, RNA)  
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proteins   macromolecule that controls rate of reactions, fights disease, forms muscle and bone  
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atom   the simplest piece of matter, one basic unit of a chemical element  
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molecule   two or more atoms bonded together by chemical bonds  
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cells   basic unit of life  
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tissue   group of similarly specialized cells that perform certain special functions  
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organ   group of tissues that together perform a specific function  
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organ system   group of organs that work together to perform one or more funtion  
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organism   an individual living thing that can react, grow, and maintain homeostasis (constant temp. water, etc).  
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