Which of the following is NOT typical of a lake ecosystem?
A. a euphotic zone
B. corals
C. plankton
D. many kinds of aquatic insects
Answer: B
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The high plateau between the Cordillera Occidental and the Cordillera Oriental of the Andes is the _______________.
Fill in the blank(s) with the appropriate word(s).
Conical igneous intrusions from which diamonds are mined are called ____________________ pipes. Fill in the blank(s) with the appropriate word(s)
Why must hydraulic fracturing or "hydrofracking" be used to extract natural gas from shale?
What will be an ideal response?
The spatial interpolation features of a geographic information system (GIS) would be most useful when a researcher needs to
A. estimate data at a particular point where it has not been measured. B. use a large-scale map but only a small-scale map of the area of interest is available. C. detect energy at a wavelength that is not detected directly by an existing satellite. D. identify the optimal route through an area.