SAT Subject Biology Practice Question 145: Answer and Explanation

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Question: 145

15. Ecologists measured the evapotranspiration and net primary production of different ecosystem types. Their results are shown in the graph.

Which factor leads to a higher rate of net primary production?

A. Biodiversity
B. Competition
C. Elevation
D. Latitude
E. Precipitation

Correct Answer: E

Explanation:

Examination of the graph reveals that precipitation leads to a higher rate of net primary production. Biodiversity may be correlated to NPP but cannot cause it.

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