An obligate association exists between a gut microbe and an insect.A new mutation in the microbe allows the microbe to utilize nutrients that were previously accessible to the insect.This change benefits the microbe,but causes some harm to the insect.The change in the relationship is best described as a change from

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The new mutation in the microbe allows it to utilize nutrients that were previously accessible to the insect, causing harm to the insect. This change in the relationship represents a shift from mutualism (both species benefit) to parasitism (one species benefits, while the other is harmed).

An Obligate Association Exists Between a Gut Microbe and an Insect.A