Answer: Resource partitioning allowing coexistence.
- A Resource partitioning allowing coexistence
- B Complete competitive exclusion of species
- C Brood parasitism between them
- D Amensalism harming one species
Correct answer: A. Resource partitioning allowing coexistence
Explanation: MacArthur showed warblers shared a tree by feeding in different zones; resource partitioning lets competitors coexist rather than one excluding the other.
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.