Question 12
(Multiple Choice)
Examine the map above (Figure 46.9),which shows indices of aquatic and terrestrial primary productivity based on concentrations of chlorophyll a.
Based on this index,primary productivity of aquatic systems:
A)is equal at all latitudes.
B)generally increases from the poles to the equator.
C)is greatest in the open ocean.
D)is usually high in warm,tropical seas.
E)tends to be high near polar regions.
Answer