HIV and AIDS are especially problematic in southern Africa; which of the following countries is experiencing the least trouble with the disease?
a. Botswana
b. Lesotho
c. Swaziland
d. South Africa
e. Congo
E
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The crude death rate
A) is the sum total of infant mortality rate, youth mortality rate and the elderly mortality rate. B) typically declines as overall levels of economic development go up. C) is typically higher in core countries than in periphery countries. D) is not considered a useful measure by most population geographers.
The countercurrent system of flow is involved in ________.
A. increasing blood flow into gills B. decreasing the time it takes for blood to flow through gills C. increasing heart rate D. increasing the efficiency of the movement of gills E. increasing the amount of oxygen that diffuses into the blood
Liquefaction occurs when seismic waves cause ________.
A. rocks to break apart and act more like fluids than solids B. waves to form and crash into low-lying areas nearby and across ocean basins C. water to be injected into sediment causing the grains to lose cohesion and behave like a fluid D. pipes in buildings to burst and weaken the foundations in the resulting flooding
What is occurring to a glacier if it has a balanced budget?
A. It is calving and forming icebergs. B. It is receding. C. It is neither advancing or receding. D. It is advancing.