Which is the most dramatic change in the geographic distribution of African Americans in the United States?
A) rural to urban within the state
B) change to sharecropping
C) relocation to northern cities
D) movement out of inner-cities
E) relocation to coastal cities
Answer: C
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A) contiguous diffusion B) hierarchical diffusion C) relocation diffusion D) the Internet
A typical population growth curve shows an exponential growth phase followed by a lag phase.
Answer the following statement true (T) or false (F)
A motor neuron connects to muscle cells through
A) electrical synapses. B) chemical synapses that use the neurotransmitter acetylcholine. C) myofibrils. D) sarcomeres.
Where is the daily temperature change the most significant in rock weathering?
A) mountain summits B) the Arctic region C) the humid tropics D) coastal areas E) midlatitude valleys