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JIMS ecology

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Term
Definition
ecology   the study of the interactions among organisms and their environment  
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abiotic factors   the nonliving parts of the environment.  
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biotic factors   the living or once living parts of the environment.  
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population   all of the individuals of one species that live in the same area.  
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community   the populations of different species that interact in some way  
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ecosystem   all of the communities in an area and the abiotic factors they interact with.  
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biosphere   the part of the Earth that supports life.  
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population density   number of individuals occupy a definite area  
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limiting factor   any biotic or abiotic factor that limits the number of individuals in a population  
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symbiosis   any close interaction between two or more different species.  
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niche   the role, or job, of an organism in the ecosystem  
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habitat   a place where an organism lives  
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commensalism   benefits one organism without affecting the other organism  
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parasitism   relationship between two species in which one species benefits and the other is harmed.  
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mutualism   relationship between two species in which both species benefit  
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