A Physical Barrier That Separates a Population in Half Anthat

question 25

Multiple Choice

A physical barrier that separates a population in half anthat leads to genetic changes is called

• A)sympatric speciation.
• B)allopatric speciation.
• C)directional selection.
• D)hybrid sterility.
• E)behavioral isolation.

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Definitions:

Bottom 90 Percent

Refers to the vast majority of a population that is not within the top 10% in terms of wealth or income, often emphasizing disparities in wealth distribution.

Middle Class

Social class composed primarily of white collar workers with a broad range of education and incomes; they constitute about 30 percent of the U.S. population.

Blue-Collar Workers

Employees who perform manual labor, often in industries involving physical work such as manufacturing, construction, and maintenance.

Meritocracy

A societal system where advancement in society is based on an individual's capabilities and merit rather than on family, wealth, or social class.