Which of the following statements best describes logistic growth?

• A. Exponential growth
• B. Linear growth
• C. Random growth
• D. Logistic growth

Answer: (D)

Logistic growth describes how a population expands rapidly at first but slows as resources become limited, eventually leveling off near the environment’s carrying capacity. This creates an S-shaped, or sigmoidal, curve because density-dependent factors like limited food, space, and waste buildup reduce the per-capita growth rate as numbers increase. In contrast, exponential growth assumes unlimited resources and keeps accelerating without leveling off, while linear growth adds the same amount each time step. Random growth isn’t a standard growth pattern for populations. So the statement that best describes logistic growth is the one that highlights rapid early growth followed by a slowdown and leveling off as carrying capacity is approached. Example: a bacterial culture that stalls once nutrients run low.