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Commensalism benefits one organism and the other organism is neither benefited nor harmed. It occurs when one organism takes benefits by interacting with another organism by which the host organism is not affected. A good example is a remora living with a shark. Remoras eat leftover food from the shark.
â¢ Mutualism: This can be used to describe an association in which both organisms apparently benefit. â¢ Commensalism: In this association one organism [the commensal ] benefits, and the other [the host ] is apparently unaffected.â¢ Parasitism In this association one organism [the parasite ] benefits, and the other [the host ] is adversely affected [weakened, sickened, damaged etc]. Mutualism: This can be used to describe an association in which both organisms apparently benefit. â¢ Commensalism: In this association one organism [the commensal ] benefits, and the other [the host ] is apparently unaffected.