Many Introduced Species Have Had Deleterious Effects on Communities and Ecosystems

question 106

Multiple Choice

Many introduced species have had deleterious effects on communities and ecosystems because

• A) coevolved parasites and pathogens are absent.
• B) the introduced species are long-lived.
• C) predators prefer the introduced species, and the local prey therefore proliferate to dangerously high levels.
• D) the community from which they came lost an important predator, competitor, or parasite.
• E) human beings do not know how to appreciate them.

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Definitions:

Supply

The total amount of a product or service that is available for purchase at any given price level in a given market.

Quantity Supplied

The total amount of a particular good or service that producers are willing and able to sell at a given price over a specific time period.

Perfectly Inelastic

A situation in demand where the quantity demanded does not change in response to a change in price; represented graphically as a completely vertical demand curve.

Demand Curve

A graphical representation showing the relationship between the price of a good or service and the quantity demanded by consumers at various prices.