The combination of the CBR and the CDR is (the)
A) rate of natural increase.
B) infant mortality rate.
C) dependency ratio.
D) life expectancy.
E) net migration.
Answer: A
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A) concentric model B) sector model C) multiple nuclei model D) adaptive concentric model E) successive hierarchy model
Two-thirds of business and professional service jobs in the U.S. are located in
A) the suburbs. B) New York City. C) large urban areas. D) dispersed medium-sized cities. E) California.
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Gray whales begin to migrate south when ________
A) breeding has concluded B) killer whales start to attack C) pack ice begins to form D) the calves are nursing E) the first calves are born