Tolerance limits are ________ that limit a species' survival.
A. Undesirable toxin concentrations
B. Population sizes
C. Temperature ranges
D. Narrow salinity levels
E. Any environmental conditions
Answer: E
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GDP differs from GPI in that
A. GDP is a subjective measure; GPI is objective. B. GPI accounts for the costs of both basic human needs and environment harm; GDP does not. C. GDP accounts for social costs; GPI focuses on economic output only. D. GDP incorporates external costs; GPI does not. E. GDP includes transactions in which money does not change hands, such as volunteer work; GPI does not.
What was the first European country to have extensive contact with Sub-Saharan Africa?
A) France B) Britain C) Portugal D) Germany E) Spain
Totality is not completely dark during a lunar eclipse because
A) of the Sun's corona. B) the line between umbra and penumbra is not sharp. C) of light refracted by the Earth's atmosphere. D) of tapering of sunlight due to the Sun's large size. E) the Moon is not directly in the Earth's shadow.
Air bubbles in the Antarctic ice sheet show that
A) carbon dioxide is relatively high during cold periods B) carbon dioxide is relatively low during cold periods C) carbon dioxide and temperature show no relationship D) the Industrial Revolution substantially increased air temperatures