Although primary productivity in tropical areas is generally low, which of the following tropical locations have unusually high primary productivity rates?
A) Equatorial downwelling zones
B) Coastal upwelling zones
C) Hypoxic zones
D) Dead zones
B
Environmental & Atmospheric Sciences
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Where on this cross section would water at the surface become groundwater?
A) 1, 2, and 3
B) 1 and 3
C) 2 and 4
D) 2 only
E) 4 only
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Describe the composition of a cinder cone
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Innovations in agriculture have increased food supply. This has allowed human populations to grow to approximately ________ by the end of the agriculture period
A) 1.5 billion B) 500 million C) 100 million D) 1 million E) 1 billion
Environmental & Atmospheric Sciences
Which statement best describes the immigration policies of Australia and New Zealand for most of the twentieth century?
What will be an ideal response?
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