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All terms in this list:

natural selection: Anything in the environment that humans use.

adaptations: A behavior or physical characteristic that helps an organism survive in it's environment.

niche: The role of an organism in it's habitat,or how it makes it's living.

competition: The struggle between organisms to survive using the same limited resource.

predation: An interaction in which one organism kills another for food.

predator: The organism that does the killing in a predation interacting.

prey: An organism that is killed and eaten by another organism.

symbiosis: a close relationship between two species that benefits at least one of the species.

mutualism: a relationship between two species which both benefit each other

commensalism: a relationship in which one species benefits and the other is nethier helped or harmed.

parasitism: a relationship in which one organism lives on or in a host and harms it.

parasite: organism that benefits by living on or in a host.

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