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chapter 21 sec 3


A characteristic that makes an individual better suited to its environment and the characteristic may eventually become common in that species. natural selection
is a role of an organism in its habitat. niche
is the struggle between organisms to survive as they attempt to use the same limited resource. competition
an interaction in which one organism kills another for food. predation
the organism that does the killing. predator
the organism that is killed. prey
is a close relatinship between two species that benefits at least one of the species. symbiosis
is when one organism lives on or inside another organism and harms it. parasitism
the organism it lives on or in. host
the organism that benefits from living on or in another species parasite
a relationship in which both species benefit mutualism
a relationship in which one species benefits and the other species is neither helped nor harmed. commensalism
The behaviors and characteristics that allow organisms to live successfully in their environment adaptaations
Created by: jafranko