Geographic Information Systems (GIS) is ________
A) used to predict rainfall and temperature changes in ecosystems
B) used to measure the economic value of ecosystem services
C) helping conservation biologists study habitats and study biodiversity
D) useful in determining the number of heterotrophs in an ecosystem
E) useful in tracking the movements of individual organisms
C
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Which of the following is the simplest possible hydrocarbon?
A. HC 
CH
B. CH4
C. H2
D. C2H6
E. H2C 
CH2
Pumping of wells can cause:
a. lowering of water table b. decline of rock permeability c. cone of depression d. all of the above e. Both a and c
Major fisheries are concentrated in the neritic zone (above the continental shelf) because of all of the following except ________
A) there are rapid changes in oxygen concentrations, temperature, and salinity that encourage diversity B) nutrients wash in from land C) the sea bottom provides shelter and habitat D) there is an abundance of sunlight to support photosynthesis
What happens to the erosive power of a stream as velocity increases?
A. Erosion decreases. B. Erosion is not related to velocity. C. Erosion increases.