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Ecology Mid-term Vocabulary 3

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Term
Definition
Adaptations   Characteristics that allow organisms to live in their environments  
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Natural Selection   Well adapted individuals will survive and reproduce better than poorly adapted individuals.  
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Niche   The role or job an organism has in its habitat  
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Competition   The struggle between organisms to survive as they attempt to use the same limited resources  
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Symbiosis   A close relationship between 2 species, where at least 1 benefits  
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Mutualism   Both species benefit  
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Commensalism   One species benefits, nothing happens to the other species  
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Parasitism   One organism (parasite) benefits by harming the other organism (host)  
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Predation   When on organism kills another for food  
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Predator   the hunter  
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Prey   the food  
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Limiting Factor   The factor that limits growth in an ecosystem (food, water, living space, mates)  
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Carrying Capacity   the number of organisms an ecosystem can support  
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Created by: Christie Ecology
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