Aquatic Animals That Lack an Internal System for Transporting O₂

question 137

Multiple Choice

Aquatic animals that lack an internal system for transporting O₂

• A) often have flat, leaflike bodies.
• B) are usually small.
• C) may have a very thin body built around a central cavity through which water circulates.
• D) have cells that are all close to the respiratory medium.
• E) All of the above

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Definitions:

Demand Curve

A graph showing the relationship between the price of a good or service and the quantity demanded by consumers, typically downward-sloping.

Supply Curve

A graphical representation showing the relationship between the price of a good or service and the quantity of it that producers are willing and able to sell.

Equilibrium Quantity

The quantity of goods or services at which quantity demanded equals quantity supplied, leading to market equilibrium.

Perfectly Inelastic

A situation in demand where the quantity demanded does not change regardless of any change in price. This means the demand curve is a vertical line, indicating total unresponsiveness to price changes.