-Examine the Figure

Multiple Choice

-Examine the figure. Zooplankton feed on phytoplankton that are contaminated by PCBs in the water. Which comparison correctly describes the concentration of PCBs in different trophic levels?

A) Primary consumers have higher PCB concentration than secondary consumers.
B) Quaternary consumers have the highest PCB concentration.
C) Tertiary consumers have the highest PCB concentration.
D) Cod has a higher PCB concentration than the secondary consumers.