Figure 29.3 shows four examples of species equilibrium numbers. In this hypothetical example, which combination of factors produces the highest number of species? The lowest number of species? In this example, is island size or distance from the mainland more important in producing a higher species equilibrium number?
The highest number of species would be found on a large island, close to the mainland. The inverse would result in the smallest number. In this example the difference in extinction rates between small and large islands is larger than the difference in immigration rates between close and far islands, so island size is more important in species equilibrium numbers.
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A. 45°. B. 60°. C. 55°. D. 40°.
Tapping just 2% of the hot, dry rock geothermal energy in the United States could produce how much of the country's energy needs?
A. 50% of the energy for electricity B. three-fourths of all energy C. all the energy necessary for electricity D. 10 times the energy needed from coal burning power plants E. 2,000 times the current annual use of electricity
Most people accept a threshold of a one in ____ chance of dying or suffering serious harm from exposure to an environmental hazard for changing their behavior.
A. 10 B. 100 C. 1,000 D. 100,000 E. 1,000,000
The first country to generate electricity geothermally was ________ in 1904
A) Japan B) New Zealand C) Italy D) Mexico City