Why are karst landscapes largely missing surface drainage?
A. Water is consumed by vegetation.
B. They are located in arid regions.
C. Water is used up in dissolution.
D. They are located in polar regions.
E. Water flows in underground channels.
E
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Which type of economic activity provides services to other sectors and goods and services to businesses and to individuals?
A. primary B. secondary C. tertiary D. mandatory
What are the four principles that conservation biologists, environmental ecologists, and some free-market economists believe should govern use of public lands?
What will be an ideal response?
Of all the natural biomes, which one is most modified by human activity?
A) midlatitude broadleaf and mixed forest B) tropical savanna C) tropical rainforest D) Mediterranean shrubland E) midlatitude grassland
The ________ wavelengths of light penetrate deepest into the ocean.
A. red B. black C. infrared D. blue E. ultraviolet