In most of the ocean, the limiting factor for rates of photosynthesis is
A) phosphorus.
B) iron.
C) carbon.
D) selenium.
E) cobalt.

Question

Quizplus · Accepted Answer

Iron is the limiting factor for rates of photosynthesis in most of the ocean. This is because iron is necessary for the production of chlorophyll, which is essential for photosynthesis. In areas where iron is limited, phytoplankton growth is limited, and thus photosynthesis rates are also limited.

In Most of the Ocean, the Limiting Factor for Rates