Which of the Following Might Be Best Explained by a Trophic

question 10

Multiple Choice

Which of the following might be best explained by a trophic cascade?

• A) Numbers of a snail eating fish go up and the numbers of snails go down.
• B) Numbers of lions go down and the numbers of zebras go up.
• C) Numbers of grazing catfish go down and numbers of algae go up.
• D) Numbers of a stream predatory fish go up and numbers of algae go down.

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