What is the most important control of temperature variations involved in weather and climate?
a. longitude
b. latitude
c. elevation
d. humidity
b
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What is particularly troublesome about the practice of mountaintop removal for mining coal in the mountains of West Virginia?
A. Dumping of waste rock in the surrounding valleys B. Land subsidence C. Cave-ins D. Gas explosions
CITES is an international treaty signed by 164 countries focused on preventing illegal trade in endangered species.
Answer the following statement true (T) or false (F)
Which term best indicates changes such as the origin of new species?
A)allopatric speciation B)mutation C)microevolution D)macroevolution E)genetic drift
In general, life expectancy
A. rises with increased annual income, but only up to about $4000. B. bears no consistent relationship to annual income. C. is greatest among country peasants. D. rises with increased annual income.