What Evidence Exists in the Predator-Prey Relationship of Rough-Skinned Newts

question 8

Multiple Choice

What evidence exists in the predator-prey relationship of rough-skinned newts (predator) and garter snakes (prey) for the evolution of variation in toxicity in rough-skinned newts and resistance to toxicity in garter snakes? Scientists have observed that ________.

• A)After unusually cold winter temperatures five years in a row, rough-skinned newts needed a mutation to increase levels of neurotoxicity, so they evolved it, while garter snakes needed a mutation to increase levels of resistance to that neurotoxin, so they evolved it.
• B)Over many generations of random mutation and nonrandom natural selection, rough-skinned newts needed a mutation to increase levels of neurotoxicity, so they evolved it, while garter snakes needed a mutation to increase levels of resistance to that neurotoxin, so they evolved it.
• C)After one generation of random mutation, rough-skinned newts with greater and greater neurotoxicity were selected for, while garter snakes with greater and greater resistance to that neurotoxin were selected for.
• D)Over many generations of random mutation and nonrandom natural selection, rough-skinned newts with increasing levels of neurotoxicity were selected for, while garter snakes with increasing levels of resistance to that neurotoxin were selected for.

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