In the United States, the Parasite That Causes Malaria Is

question 8

Multiple Choice

In the United States, the parasite that causes malaria is not present, but African-Americans whose ancestors were from equatorial Africa are present. What should be happening to the sickle-cell allele in the United States, and what should be happening to it in equatorial Africa?

• A) stabilizing selection; disruptive selection
• B) disruptive selection; stabilizing selection
• C) disruptive selection; directional selection
• D) directional selection; disruptive selection
• E) directional selection; stabilizing selection

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Definitions:

Discretionary Fiscal Policy

Government policy actions, through spending or taxation, aimed at influencing economic conditions based on current economic assessments.

Budget Deficit

The financial situation where an entity's expenses exceed its revenues within a given timeframe.

Annually Balanced Budget

Budget philosophy prior to the Great Depression; aimed at matching annual revenues with outlays, except during times of war.

Business Cycle

The periodic fluctuations in economic activity characterized by phases of expansion and contraction.