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🔬 Biology  ·  Organisms and Populations  ·  NEET

Migratory birds such as Siberian cranes travelling to Indian wetlands in winter best illustrate which response to environmental stress?

Answer: Migrate.

  • A Regulate
  • B Conform
  • C Migrate
  • D Suspend

Correct answer: C. Migrate

Explanation: Migration allows organisms to temporarily move away from a stressful habitat to a more favourable one and return once conditions improve.

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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