GPS units are
A) accurately allow determination of longitude and latitude.
B) a metric version of longitude and latitude.
C) th of a Greenwich Precision Second.
D) not available to the public; they are only available to the military.
A
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In the years after World War II, this country emerged as the hegemonic power
A) Soviet Union B) Britain C) China D) United States E) Japan
Coal forms from
A. evaporation of algae-rich lakes. B. organic-rich volcanic ash. C. thick tar that solidifies to rock. D. plants buried in sediment.
Manipulative experiments
A. are most often conducted in a laboratory. B. are not possible. C. do not allow the scientist to control variables. D. are not useful to ecologists because they depend on the natural environment.
A habitat consists of
A) the source of energy that a species acquires. B) the position of a species on the food chain or food web. C) the physical environment where a species lives. D) the rate of nutrient cycling that takes place in an ecosystem.