Which of these countries is experiencing the greatest stress from overuse of its surface water?
A. Saudi Arabia
B. Great Britain
C. Canada
D. Brazil
Answer: A
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Developing countries have increasingly become involved in the integrated global economy primarily due to
A) increased use of vaccinations. B) improvements in sewage and sanitation. C) constructions of dams and irrigation canals. D) increased use of technology.
Which of the following correctly describes the distribution of K+ and Na+ ions?
A) [K+] is low both inside and outside the cells, and [Na+] is high both inside and outside the cells. B) [K+] is high both inside and outside the cells, and [Na+] is low both inside and outside the cells. C) [K+] is high inside the cells and low outside the cells, but for [Na+] the reverse is true. D) [K+] is low inside the cells and high outside the cells, but for [Na+] the reverse is true.
Tidal power stations operate by using
A. Turbines that spin in the flow of tide water B. The differential heat of inshore and offshore waters C. The energy from waves as they crash on the shore D. Electrolytic decomposition of saltwater E. All of these together
Which of the following is an ecosystem service?
A) Cleaning up a hiking trail in Rocky Mountain National Park B) Wetlands breaking down pesticides before they enter a waterway C) The Nature Conservancy buying sensitive land that lacks protection D) Recycling aluminum in order to extend the life expectancy of bauxite ore