In a Study of the Differences Between Populations of Humans,Richard

question 79

Multiple Choice

In a study of the differences between populations of humans,Richard Lewontin found that the total amount of genetic variation between groups is:

• A)37%.
• B)23%.
• C)14%.
• D)11%.
• E)7%.

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Definitions:

Intake Valves

Mechanical components in an engine that open to allow the air/fuel mixture into the combustion chambers during the intake stroke.

S-Cam Brakes

Drum brake system in which the shoes are driven into the drum by rotating an S-shaped cam, spreading the shoes.

Service Brake Torque

The amount of torque applied by the service brake system to slow or stop a vehicle, typically measured at the wheels.

Brake Treadle Valve

A valve operated by a pedal that controls the flow of air or hydraulic fluid to the brakes.