Refer to the Figure

question 52

Multiple Choice

Refer to the figure.
The global pattern of Net Primary Production (NPP) in the figure shows two peaks in the northern hemisphere-one at 45^oN latitude and one at 0^o N latitude. These two peaks are primarily due to which climatic factors that control NPP?

• A) Oceanic upwelling is highest at the equator and mid-latitudes, and most of the globe is covered by the ocean.
• B) Mid-latitudes and the equator have the narrowest daily thermal variation, reducing temperature constraints on photosynthesis.
• C) The primary forests of the world are found at 45^oN latitude and oat 0^o N latitude.
• D) The wettest terrestrial ecosystems globally are found at 45^oN latitude and one at 0^o N latitude due to global circulation patterns.

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Definitions:

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