Upwelling areas are more productive than oceanic areas because ________ in upwellings.
A. there are more nutrients
B. organic matter is more concentrated
C. food chains are shorter
D. All of these are correct.
E. None of these is correct.
Answer: D
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What part of the Earth does not have glaciers or ice sheets today?
A) Tropics. B) Midlatitudes. C) Polar areas. D) Tropics and midlatitudes. E) All of these areas have glaciers or ice sheets today.
Of the following, ________ can change global species diversity
A) emigration and extinction B) immigration and extirpation C) speciation and immigration D) extirpation and extinction E) speciation and extinction
Photosynthesis is a process by which nitrogen enters the atmosphere
Indicate whether the statement is true or false
The turbulent water created by breaking waves is called surf
Indicate whether the statement is true or false