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🔬 Biology  ·  Organisms and Populations  ·  NEET

Cuckoos (koels) laying eggs in a crow's nest is an example of:

Answer: Brood parasitism.

  • A Mutualism
  • B Commensalism
  • C Brood parasitism
  • D Amensalism

Correct answer: C. Brood parasitism

Explanation: Brood parasitism is a special form of parasitism in birds where the parasitic species lays eggs in the host's nest, letting the host incubate and raise its young.

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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