3
QuizMultiple Choice

Determining Population Size

Question 3 • Environmental Science A

Which of the following statements about logistic growth curves is true?

Answer
A
Logistic growth curves are common for R-selected species.
B
Logistic growth curves are J-shaped.
C
No organisms in nature experience logistic growth rates.
D
Logistic growth curves increase exponentially at first, then experience slowed growth rates.

Explanation

A logistic growth curve is S-shaped: a population grows rapidly at first when resources are abundant, then its growth slows as it approaches carrying capacity. Choice D describes this pattern. Choice B is incorrect because J-shaped curves represent exponential growth without the same leveling off.

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