Which Statement About the Amphibians That Colonized the Area Around

question 16

Multiple Choice

Which statement about the amphibians that colonized the area around Mount St. Helens after the eruption is true?

• A) The frog Rana cascadae was the most important animal ecosystem engineer in the community.
• B) Frogs and salamanders started to colonize the area within the first few years of the eruption.
• C) By the year 2000, the species diversity of amphibians had reached pre-eruption levels.
• D) Both a and b

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