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1 (e) Symbiosis

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Symbiosis (sim bee oh sis) is a close relationship between two species that benefits at least one of the species. The three types of symbiotic relationships are mutualism, commensalism, and parasitism.  A relationship in which both species benefit is called mutualism (myoo choo uh liz um).  A relationship in which one species benefits and the other species is neither helped nor harmed is called commensalism (kuh men suh liz um).  Parasitism (pa ruh sit iz um) involves one organism living on or inside another organism and harming it. The organism that benefits is called a parasite, and the organism it lives on or in is called a host.

Alien Symbiosis: ..................For quia.