The Common Garter Snake Is a Predator of the Rough-Skinned

question 9

Multiple Choice

The common garter snake is a predator of the rough-skinned newt. These newts produce a potent neurotoxin that is concentrated in their skin, but garter snakes have evolved resistance to this toxin. Over the years, the neurotoxin has become more toxic. How might the toxin have changed over time?

• A) mutation
• B) gene flow
• C) adaptive radiation
• D) sexual selection

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Definitions:

Short Run

The short run is a period in economics where at least one factor of production is fixed, limiting the adjustments a firm can make to its inputs.

Average Variable Cost

The total variable cost divided by the quantity of output produced; it shows the cost of producing one more unit of output.

Short Run

A period in which at least one input in the production process is fixed, limiting the ability of the firm to adjust production.

Competitive Firm

A business operating in a market where it has little to no influence over the price of its product or service due to competition.