A marine biologist designs a study to measure net primary productivity in the world's oceans. She travels to the coastal zone of each continent, takes measurements from north, south, east, and west points along the continent, and combines her data into a
global average. Will these measurements be accurate?
A) No, because ocean life is greatest near the poles and decreases toward the equator.
B) Yes, but only if she is sure to sample different climatic zones carefully, because production in different climatic zones may vary by an order of magnitude.
C) Yes, because although production in different climate zones differs, the open ocean is well mixed because of strong ocean circulation patterns.
D) No, because ocean productivity is greatest past the intertidal zone.
E) No, because the continental edges have much higher productivities than the open ocean.
Answer: E
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