If the Flow of Energy in an Arctic Ecosystem Goes

question 64

Multiple Choice

If the flow of energy in an arctic ecosystem goes through a simple food chain, perhaps involving humans, starting from phytoplankton to zooplankton to fish to seals to polar bears, then which of the following could be accurate?

• A) Polar bears can provide more food for humans than seals can.
• B) The total biomass of the fish is lower than that of the seals.
• C) Seal populations are larger than fish populations.
• D) Fish can potentially provide more food for humans than seal meat.

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Definitions:

Fixed Costs

Costs that do not change with the level of output or production, such as rent, salaries, or loan payments.

Variable Costs

Costs that change in proportion to the amount of goods or services produced.

Average Total Cost

The sum of all production costs divided by the quantity of output produced, yielding the cost per unit on average.

Output

The complete sum of products or services created by an enterprise, field, or economic entity.