Primary productivity of the open oceans is very limited because of

A) the shortage of water.
B) the shortage of light.
C) the shortage of nutrients.
D) low temperature.


C

Environmental & Atmospheric Sciences

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Radioactive decay in the Earth, especially in the Earth's crust, creates a tremendous amount of

A. pressure. B. heat.

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Which of the following is not a possible cause of coral bleaching?

A) ocean acidification B) disease C) pollution D) parasitic relationship between the coral polyp and algae E) sedimentation

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Even as early as 1910 in the U.S., services exceeded manufacturing employment

Indicate whether the statement is true or false

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