Natural Selection Can Move a Population Beyond Its Initial Range

question 65

Multiple Choice

Natural selection can move a population beyond its initial range of variation because

• A) sudden increases in mutation rates are often induced by selection.
• B) under genetic drift there is less variation and under selection there is more.
• C) selection can expose hidden variation.
• D) selection usually increases the randomness of mating, thus increasing variation.

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Definitions:

Long Run

The long run is a time period sufficiently long that all factors of production and costs can be fully adjusted, including plant sizes, machinery, and entry or exit from an industry.

Monopolistically Competitive

A market structure where many firms sell similar but not identical products, allowing them some power to influence prices.

Efficient Use of Resources

An economic condition where resources are allocated in the most effective manner possible to meet the needs and desires of consumers.

Long-Run Equilibrium

A state in which all firms in a market or industry are making normal profits and there is no incentive for firms to either enter or exit the market.