The _____________ forms the core of North America. Fill in the blank(s) with the appropriate word(s)
Canadian shield
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Which of the following is TRUE regarding world population?
A) The most significant factor in explaining population growth of a country is when it was colonized. B) Life expectancies are higher for women than men, in both the developed and developing worlds. C) Planck's theories of migration have been elevated into laws of migration. D) Rates of natural increase are highest in cities. E) Total fertility rates explain flows of international migrants.
The size of a species' population that an ecosystem can support is called the _______________
Fill in the blank(s) with correct word
Which type of reef is separated from the coast of an island by a shallow lagoon?
a. barrier reef b. longshore reef c. atoll reef d. fringing reef e. active-margin reef
First order streams are the ________ of all streams
A) shortest B) longest C) widest D) deepest E) fastest