In the 1990s, Oceanographic Researchers Added Iron Sulfite to the Surface

Multiple Choice

In the 1990s, oceanographic researchers added iron sulfite to the surface waters around the Galápagos Islands.The result of this experiment showed that iron

A) was not necessary to NPP in oceans.
B) was toxic to primary producers in this region.
C) prevented the uptake of CO₂ by ocean waters.
D) was the primary factor limiting NPP in this region.
E) increased the uptake of CO₂ by ocean waters.