In the Northeastern Pacific Ocean,sea Otters Occur at a Relatively

question 42

Multiple Choice

In the northeastern Pacific ocean,sea otters occur at a relatively low abundance.By preying upon sea urchins,sea otters maintain underwater kelp (large algae) "forests",which would otherwise be decimated by the herbivorous sea urchins.The kelp forests supply food for a wide variety of marine organisms,as well as providing refuge from predation and nursery habitat for juveniles.Based on this,what type of species best describes sea otters?

• A)indicator species.
• B)flagship species.
• C)keystone species.
• D)dominant species.
• E)umbrella species.

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Disposable Income

The amount of money that households have available for spending and saving after income taxes have been accounted for.

Personal Income

The total amount of income received by individuals from all sources, including wages, dividends, interest, and government transfers, before any deductions.

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The difference between taxes paid to the government and transfer payments received from the government.

Circular Flow

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