Q. In biological terms, ___ is a relationship between two organisms in which one organism benefits and the other is unaffected:
Answer: Commensalism
Notes: Commensalism is a type of relationship between two living organisms in which one organism benefits from the other without harming it. ? A commensal species benefits from another species by obtaining locomotion, shelter, food, or support from the host species, which (for the most part) neither benefits nor is harmed.

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