Studies of Rough-Skinned Newts Have Documented Their Ability to Produce

Studies of rough-skinned newts have documented their ability to produce toxins in defense against a predator attack. The common garter snake, a predator of rough-skinned newts, exhibits a resistance to the toxin produced by the newt. In response, newts have been observed to produce increasingly potent toxins, which in turn results in selection for snakes with even greater resistance to the toxin. What phrase best describes this interaction between rough-skinned newts and garter snakes?

A) host-parasite coevolution
B) obligate mutualism
C) evolutionary arms race
D) diffuse coevolution

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