Phytoplankton play an important role in which of the following biogeochemical cycles?
a. the nitrogen cycle
b. the phosphorus cycle
c. the carbon cycle

The answer is C. Phytoplankton play an important role in the carbon cycle. They are critical in regulating carbon in the cycle. These organisms consume carbon dioxide from the atmosphere and transport the gases and nutrients from the surface of the ocean to the deep.

1. cannot2. laws3. theories

The answer would be a. aluminum can