A small flock of birds becomes stranded on an isolated island during a hurricane. The birds successfully breed and spread across the island. Several decades later, another flock of birds of the same species also becomes stranded on the island
The new arrivals are slightly larger than the rest of the birds, but they freely interbreed with the rest of the birds, and they produce fertile offspring. Which one of the following processes is best illustrated in this example?
A) Genetic drift B) Gene flow C) Speciation D) Natural selection
B
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Enforcement of Superfund and cleanup of polluted sites has slowed because
A. responsible parties have been quick in cleaning up pollution. B. pollution is no longer a major concern for waste producing industries. C. local governments and small businesses willingly take on the responsibility for cleanup. D. the U.S. Congress refused to renew the tax on oil and chemical companies that funded the program. E. most of the waste sites in the U.S. have already been cleaned up.
The amount of useful work accomplished by a particular input of energy into a system is
a. Energy quality b. Energy potential c. Energy capacity d. Energy efficiency e. Energy loss
Assess which measure is most effective at capturing the level of development
What will be an ideal response?
Which of the following is NOT true of marine west-coast climates?
A) They are dominated by mP air masses. B) These climates experience very cold winters because of their high latitude (about 45° to 55° north). C) The weather is quite unpredictable. D) The air masses in this region are unstable.