Explain which three marine habitats would have the least access to phytoplankton, and why.

Answer:

The deep sea, sea floor, and open oceans would have the least access to phytoplankton. Phytoplankton are only found near the surface of marine habitats, in the photic zone, so the ocean floor and deep sea habitats do not directly support phytoplankton. The open ocean habitat does support some phytoplankton, but the amount of surface area with access to sunlight is actually quite small relative to the volume of the habitat so it also has little access to phytoplankton.