How does a logistic growth curve differ from an exponential growth curve?

• A. A logistic growth curve shows a constant rate of increase, while an exponential growth curve shows a decreasing rate of increase.
• B. A logistic growth curve only applies to populations with unlimited resources, while an exponential growth curve applies to populations with limited resources.
• C. A logistic growth curve decreases over time, while an exponential growth curve remains constant.
• D. A logistic growth curve levels off at the carrying capacity, while an exponential growth curve continues to increase without limit.

Answer: (D)

Verified step by step guidance

1. Understand the concept of exponential growth: Exponential growth occurs when a population grows at a constant rate per unit of time, resulting in a J-shaped curve. This type of growth assumes unlimited resources and no environmental constraints.
2. Understand the concept of logistic growth: Logistic growth occurs when a population's growth rate decreases as it approaches the carrying capacity of the environment. This results in an S-shaped curve, where the population levels off at the carrying capacity due to limited resources and environmental resistance.
3. Compare the two growth curves: Exponential growth continues to increase without limit, while logistic growth levels off at the carrying capacity, which is the maximum population size that the environment can sustain.
4. Recognize the role of carrying capacity in logistic growth: Carrying capacity is determined by factors such as food availability, habitat space, and competition. Logistic growth reflects the realistic limitations of these resources.
5. Apply the correct answer: Based on the definitions and differences, the correct answer is that a logistic growth curve levels off at the carrying capacity, while an exponential growth curve continues to increase without limit.