SAT Subject Biology Practice Question 222: Answer and Explanation

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Question: 222

12. Scientists examined the effects of adding nutrients to waters off the Eastern coast of the United States. The graph shows the nutrient added and the resulting algae counts at six locations. No nutrients were added in the control condition.

Which location experienced the greatest increase in algae in response to the addition of phosphorus?

A. 1
B. 2
C. 3
D. 4
E. 5

Correct Answer: C

Explanation:

Location 3 exhibited the greatest increase in algal growth in response to the addition of phosphorus (gray bars).

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