SAT Subject Biology Practice Question 138: Answer and Explanation

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Question: 138

8. A lake filled with algae that are choking out aquatic plants and fish is likely experiencing which process?

A. Succession
B. Eutrophication
C. Denitrification
D. Carbon fixation
E. Acid rain runoff

Correct Answer: B


Algae are photosynthetic organisms that thrive in conditions of abundant nutrients such as nitrogen. A eutrophic lake is one that contains an overabundance of nutrients.

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