Please Use the Following Information to Answer the Questions Below

question 48

Multiple Choice

Please use the following information to answer the questions below.
Figure 27.2
Fishes that have swim bladders can regulate their density and thus their buoyancy.There are two types of swim bladder: physostomous and physoclistous.The ancestral version is the physostomous version,in which the swim bladder is connected to the esophagus via a short tube (Figure 27.2) .The fish fills this version by swimming to the surface,taking gulps of air,and directing them into the swim bladder.Air is removed from this version by "belching." The physoclistous version is more derived and has lost its connection to the esophagus.Instead,gas enters and leaves the swim bladder via special circulatory mechanisms within the wall of the swim bladder.
-The presence of a swim bladder allows the typical ray-finned fish to stop swimming and still

• A)effectively circulate its blood.
• B)be highly maneuverable.
• C)use its swim bladder as a respiratory organ.
• D)not sink.

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Definitions:

Natural Monopolies

A market structure in which a single supplier is the most efficient at delivering goods or services due to unique circumstances, often regulated by the government.

Market Power

The ability of a firm or entity to influence the price and production levels within a market.

Natural Monopoly

A situation in which a single firm can produce the entire market output at a lower cost than could several firms, making it most efficient for a single firm to serve the entire market.

Average Total Cost

The total cost of production divided by the total quantity of output produced.