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Ecosystems

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Term
Definition
predator   a consumer that hunts and eats another animal  
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prey   any animal that is hunted by others for food  
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producer   organism that makes its own food for energy  
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consumer   organism that cannot make its own food  
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decomposer   organism that gets its energy by breaking down wastes and dead organisms  
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food chain   a series of steps by which energy moves from one type of living thing to another  
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food web   a diagram that combines many food chains into one picture  
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photosynthesis   the process in which producers use carbon dioxide, water, and sunlight to produce oxygen and sugar.  
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symbiosis   a relationship between two organisms of a different species that benefits at least one of the organisms  
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parasitism   a relationship in which one of the organisms lives on or in a host and harms it  
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commensalism   a relationship between two species in which one benefits and the other is neither helped nor harmed  
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mutualism   a relationship in which both species benefit  
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