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🔬 Biology  ·  Organisms and Populations  ·  NEET

In the exponential growth curve dN/dt = rN, when plotted against time the curve is shaped like which letter?

Answer: The letter J.

  • A The letter J
  • B The letter S
  • C The letter U
  • D The letter V

Correct answer: A. The letter J

Explanation: Unlimited resources give exponential growth, producing a J-shaped curve when population size is plotted against time.

Exponential (J-curve) vs Logistic (S-curve) GrowthtimePopulation (N)Exponential (unlimited resources)K (carrying capacity)Logistic (limited resources)Logistic growth slows as N approaches K; exponential growth never slows down

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.

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