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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