E.coli bacteria normally live in the human gut and produce vitamin K that the body uses.This is best termed a ______ relationship.

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A mutualistic relationship is a relationship in which both organisms benefit from the interaction. In this case, E.coli produces vitamin K that the body uses, which is beneficial to the human host. Therefore, this relationship is best termed as mutualistic.

EColi Bacteria Normally Live in the Human Gut and Produce