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:

Collective Conscience

A collection of common convictions, thoughts, and ethical viewpoints that act as a cohesive element in a community.

Shared Meanings

The common understandings or interpretations among members of a society or group regarding symbols, language, and behaviors, which facilitate communication and social interaction.

Functionalist Beliefs

A perspective in sociology and anthropology that interprets society as a structure with interrelated parts designed to meet the biological and social needs of individuals that make up that society.

Critiques

Detailed analysis and assessment of something, especially a literary, philosophical, or political theory.