A Moderate-Size Lake in the American Midwest Suddenly Has Succumbed

question 86

Multiple Choice

A moderate-size lake in the American Midwest suddenly has succumbed to an algal bloom.What is the likely cause of eutrophication in this lake?

• A)increased solar radiation during the summer season
• B)the introduction of non-native tertiary consumer fish
• C)excessive farm fertilizer runoff during a heavy rainfall
• D)accidental introduction of a prolific culture of algae
• E)iron dust blowing into the lake from area factories

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