The Figure Below Shows the Relative Concentration of Polychlorinated Biphenyls

question 53

Multiple Choice

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.

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Definitions:

Aggregate Supply Curve

Represents the total supply of goods and services that firms in an economy are willing to sell at a given price level in a certain time period.

Upward Slope

In economics, it typically represents an increase or positive trend in a graph, such as rising prices or increasing production over time.

Keynesian Economics

A theory that advocates for increased government expenditures and lower taxes to stimulate demand and pull the global economy out of depression.

Downward Rigidity

A situation in economics where wages or prices are resistant to decrease even in conditions where they logically should, such as during a recession.