The figure below shows the relative concentration of polychlorinated biphenyls (PCBs)in several members of a lake food web.
Although the lake trout and minnow are both fish, the lake trout is more contaminated. Why?
A)Lake trout are bigger so their bodies can store a greater quantity of PCBs.
B)PCBs dissolve poorly in water but readily in fat; lake trout have a higher percentage of body fat than minnows.
C)Lake trout are large and long-lived; when they respire they pass water over their gills allowing the PCBs in the lake to accumulate in their bodies.
D)Lake trout fed on minnows, whereas minnows fed on crustaceans.

Question

The figure below shows the relative concentration of polychlorinated biphenyls (PCBs)in several members of a lake food web. 
Although the lake trout and minnow are both fish, the lake trout is more contaminated. Why?
A)Lake trout are bigger so their bodies can store a greater quantity of PCBs. 
B)PCBs dissolve poorly in water but readily in fat; lake trout have a higher percentage of body fat than minnows. 
C)Lake trout are large and long-lived; when they respire they pass water over their gills allowing the PCBs in the lake to accumulate in their bodies. 
D)Lake trout fed on minnows, whereas minnows fed on crustaceans.

Quizplus · Accepted Answer

The Answer is D

The Figure Below Shows the Relative Concentration of Polychlorinated Biphenyls