Assume That in a Small Population, 15 Percent of the People

question 9

Multiple Choice

Assume that in a small population, 15 percent of the people are blue-eyed and have brown hair. Assume further that within this population, there is an adventurous group that wishes to explore the region and settle down in new territory. Of this adventurous group, 87 percent are blue-eyed and have brown hair. When they leave, the gene frequencies in the remaining population will change for blue-eyes and brown hair in the next generation. This is an example of

• A) gene flow.
• B) genetic drift.
• C) mutation.
• D) natural selection.

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Definitions:

Exhaust Valves

Components in an engine that open to allow exhaust gases to exit the combustion chamber after the power stroke.

DOHC

Stands for Dual Overhead Camshaft, a design in internal combustion engines where two camshafts are used to control the valves for improved performance.

Internal Combustion Engines

Engines that generate mechanical power by burning a fuel-air mixture within combustion chambers to create high-pressure gases that drive movement.

Intake

The part of an engine that draws air into the combustion chamber, sometimes referring more broadly to the system including air filters and intake manifolds.