SAT Subject Biology Practice Question 62: Answer and Explanation

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Question: 62

1. Which of these best describes the population growth shown in the graph?

A. On day 1, the resources of the population limit its growth.
B. On day 2, the birthrate per individual is greater than on day 1.
C. On day 3, the population size is equal to K.
D. On day 4, the curve is most similar an exponential growth curve.
E. On day 5, the number of deaths approaches the number of births.

Correct Answer: E


Logistic population growth has different rates of increase over time. Growth rate decreases as the population size approaches the carrying capacity (K) of the ecosystem. Early logistic growth resembles exponential growth, in which the per capita rate of increase is constant.

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