The danger of carcinogens lies in their effect on
A) oxygen-carrying red blood cells.
B) the ability of the lining of the lungs to absorb oxygen.
C) DNA molecules inside cells.
D) the ability to absorb nutrients in the wall of the intestines.
C
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Drawing the boundaries of voting districts so that one group has an unfair advantage is
A) apportionment. B) a census. C) gerrymandering. D) a technique used throughout Europe.
The atmospheric window:
A) is caused by the absence of certain gasses. B) is a local phenomenon similar to the ozone hole that opens over Antarctica in winter. C) is located at a band of wavelengths between 2 and 6 micrometers. D) allows certain wavelengths of longwave radiation to pass through the atmosphere.
Compare and contrast life before and after the Agricultural Revolution
The red areas in the map below are places where
A. soil erosion due to wind is a major problem. B. soil is being formed faster than it is being eroded away. C. salinization is leaving the soil ineffective for agriculture. D. soil erosion due to water is a major problem.