Ecosystem - all of the biotic and abiotic factors and their interactions in a specific environment, Population - a group of the same species in a specific area, Competition - when two or more organisms require the same resource and there may not be enough for all, Abiotic - nonliving factors in an environment, Biotic - living factors in an environment, Limited Resource - something needed by organisms that may not be abundant, Carrying Capacity - the maximum population that can survive in an environment, Limiting Factors - things that can limit the size of a population, Niche - the role of an organism in its environment; where it fits best, Species - a group of similar organisms that can mate and produce offspring, Scarce/Scarcity - resources that are limited, Abundant - resources that are plentiful,

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