A Shady Bench on a Hot Day at a Public

question 160

Multiple Choice

A shady bench on a hot day at a public park is an example of a good that is

• A)rivalrous and excludable.
• B)nonrivalrous and excludable.
• C)rivalrous and nonexcludable.
• D)nonrivalrous and nonexcludable.
• E)neither rivalrous nor nonrivalrous.

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Definitions:

Parabronchi

Minute tubular air passages within the lungs of birds through which respiratory gas exchange occurs, part of their highly efficient respiratory system.

Birds

Warm-blooded vertebrates characterized by feathers, beaks without teeth, and laying hard-shelled eggs.

Countercurrent Exchange

A mechanism in which fluids flow in opposite directions, exchanging properties (such as heat or chemical constituents) to maximize transfer rates.

Gills

Respiratory organs in certain aquatic organisms, allowing them to extract oxygen from water.