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

question 27

Multiple Choice

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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Definitions:

Marginal Revenue

The additional income earned by selling one more unit of a product or service.

Toys

Objects designed for play, typically used by children, that can range from simple handmade items to complex electronic gadgets.

Demand Schedule

A chart displaying how much of a product consumers are ready and able to buy at different price points.

Maximize Profits

Refers to strategies or actions undertaken by a business or enterprise aimed at increasing the difference between its total revenues and total costs.