Consider the Following Scenario: a Fish That Was Normally Found

question 205

Multiple Choice

Consider the following scenario: A fish that was normally found in freshwater has evolved and can now survive in brackish water which contains a mixture of fresh and salt water. How would this affect other levels of biology?

• A) The evolution of the fish would affect all other levels of biology, including other populations, communities, and ecosystems.
• B) The evolution of the fish would only affect the population of that fish species.
• C) The evolution of the fish would only affect the community in which it occupies.
• D) The evolution of the fish would only affect the organisms it eats.

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Definitions:

Average Variable Cost

The total variable costs (costs that change with the level of output) of a firm divided by the quantity of output produced.

Total Variable Costs

The sum of all costs that vary with the level of output, including costs for raw materials, labor, and other expenses that change with production volume.

Purely Competitive

A purely competitive market is characterized by many buyers and sellers, homogeneous products, and no barriers to entry or exit, leading to price taking behavior by firms.

Economic Profit

The difference between a firm's total revenues and its total costs, including both explicit and implicit costs, as opposed to accounting profit which only subtracts explicit costs.