Answer: Population density.
- A Population density
- B Carrying capacity
- C Natality
- D Biotic potential
Correct answer: A. Population density
Explanation: Population density is the number of individuals of a population present per unit area or volume at a given time.
Exponential growth produces an ever-steepening J-curve with no limit, an unrealistic long-term model; logistic growth produces an S-curve that levels off at the carrying capacity K, as growth rate (K−N)/K shrinks to zero once resources are fully used.
Concept context
How organisms interact with abiotic factors and respond to stress, plus population attributes, growth models, and interspecific interactions such as predation, competition, and mutualism.