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Describe three adaptations that enhance the function of a respiratory surface.
Competitive Market
A market structure characterized by a large number of buyers and sellers, free entry and exit, and a product for which there are many substitutes.
External Benefit
A benefit that people other than the consumer or producer enjoy, resulting from a transaction or activity.
Economic Efficiency
A condition in which all available resources are utilized in the most effective manner to satisfy society's needs and wants, minimizing waste and maximizing value.
Market Price
The current market value at which an asset or service is up for sale or purchase.
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