What ecosystem has the highest rate of primary productivity?
A) savanna
B) agricultural land
C) algal beds and reefs
D) boreal forest
E) tropical rain forest
Correct Answer:
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Q21: Bacteria are most essential in the cycling
Q22: A primary source of carbon for photosynthetic
Q27: The event in human history that changed
Q29: Which process does not return carbon to
Q29: The major components of Earth's atmosphere, from
Q30: Fossil fuels, such as coal and oil,
Q31: Four of the five answers listed below
Q32: Four of the five statements listed below
Q38: Fixation of carbon is accomplished by
A) photosynthetic
Q39: To date, humans have interfered with all
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