The rugged terrain, low population densities, dry climate, and high transportation costs of the Intermontane meant that which sector of the economy never successfully developed?
A) A primary sector
B) A secondary sector
C) A tertiary sector
D) A quaternary sector
B
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During the last two million years, there have been at least ____________________ warm-cold cycles. Fill in the blank(s) with the appropriate word(s)
Which of the following best matches the description?Process of replanting an area after the original trees are removed.
A. clear-cutting B. cover C. selective harvesting D. reforestation E. threatened species F. speciation G. patchwork clear-cutting H. mutation I. biodiversity J. species diversity K. endangered species L. extinction M. habitat management
All of the following are potential consequences of inadequate treatment of drinking water except ________
A) dehydration caused by drinking contaminated water B) contraction of gastrointestinal disease C) contamination of groundwater resources with harmful bacteria D) drinking water that contains feces
Which of the following does not belong with the others?
A) Topographic influences B) Light C) Edaphic influences D) Oxygen cycle E) Wind