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MMLU / Which of the following is the best explanation for why net primary productivity…

Problem

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question

Which of the following is the best explanation for why net primary productivity in terrestrial ecosystems tends to increase toward the tropics?

choices

  1. The higher species diversity in the tropics tends to increase plant growth.
  2. There are lower metabolic costs to plant growth in the tropics.
  3. The availability of water and warm temperatures in the tropics fosters photosynthesis.
  4. The tropics have more predators that minimize herbivory.

subject

college_biology

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