A majority of undocumented migrants to the United States come from
A) China.
B) Mexico.
C) Canada.
D) Europe.
E) Africa.
Answer: B
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The greatest of all reefs is the ____
A) ?Florida Keys B) ?Red Sea Coral Reef C) ?Australian Great Barrier Reef D) ?Belize Barrier Reef
Many hill-slope masses are weak due to preexisting geologic conditions such as ________.
A. structures within the rocks, such as fractures, ancient faults, and thin clay seams B. ancient slide surfaces C. rock layering dipping less than topographic slopes D. All of these choices are correct.
Sustainable living means:
a. consuming only manufactured resources b. consuming resources at a level that Earth can sustain indefinitely c. consuming resources at a level to which Earth can easily adapt d. consuming no resources
Evolutionary development comes as a result of ________
A) geographic location B) extinction C) DNA mutations D) unknown processes E) species migration