Scenario Over the Past 60 Years, Many Amphibian Species Have Experienced

question 46

Multiple Choice

Scenario
Over the past 60 years, many amphibian species have experienced significant population declines, and some species have become extinct. Scientists suspected that local human activities such as the destruction of wetlands, regional pollution, and deforestation were the main reasons for these losses. However, research over the past 20 years reveals significant amphibian population declines in protected areas of the world, such as nature preserves and parks. These global declines suggest widespread problems, including increased ultraviolet radiation, acid rain, and disease. In Switzerland, for example, 14 of the 20 native amphibian species are threatened with extinction.
-When most populations of a wide-ranging amphibian species are lost and the few remaining populations are widely separated, we expect to see that ________.

• A)artificial selection becomes a greater factor in microevolution
• B)the founder effect becomes increasingly important
• C)gene flow between populations is reduced
• D)microevolution no longer occurs

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Definitions:

Production Costs

Expenses directly and indirectly involved in creating a product, including materials, labor, and overhead costs.

Absorption Costing

An accounting method that includes all manufacturing costs - direct materials, direct labor, and both variable and fixed overhead - in the cost of a unit of product.

Net Income

The total profit of a company after all expenses, including taxes, have been subtracted from total revenues.

Operating Expenses

Costs associated with running the day-to-day operations of a business, excluding costs related to production or manufacturing.