SAT Subject Biology Practice Question 123: Answer and Explanation

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Question: 123

13. The graph depicts the population size of a species over time.

The dashed lines most likely represent

A. independent climax communities
B. carrying capacities for different populations
C. carrying capacities for the same population
D. similar effects of predation on different populations
E. similar effects of predation on the same population

Correct Answer: C


Because this graph demonstrates population growth for only one population, the answer cannot be Choice B or D. Climax communities are a product of succession, which is not being discussed in this question, making Choice A incorrect. Population growth is influenced by more than just predation rates, making both Choices D and E incorrect.

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