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Limiting factors Knowledge-Based Practice

Biology · Ecology · Biology · Populations

5 Biology practice questions on Limiting factors. Questions that assess core concepts and understanding.

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Questions

  1. 1.

    Which ecological principle explains that an environmental condition can become a limiting factor for a population not only when it is deficient, but also when it is present in excessive amounts?

    • A) Competitive exclusion principle
    • B) Shelford's law of tolerance
    • C) Theory of island biogeography
    • D) Allen's ecological rule
  2. 2.

    According to the ecological principle of limiting factors, which condition determines the maximum growth rate and productivity of a biological population?

    • A) The specific essential resource that is available in the shortest supply relative to the population's requirements
    • B) The total combined quantity of all environmental resources, regardless of which individual components are lacking
    • C) The availability of whichever resource is consumed in the greatest physical volume by individual organisms
    • D) The rate of predation exerted by consumer species occupying the highest trophic tier of the community
  3. 3.

    Which of the following scenarios best exemplifies a density-independent limiting factor affecting a biological population?

    • A) An infectious bacterial outbreak transmits rapidly across an overcrowded herd of grazing herbivores.
    • B) A sudden severe frost kills exposed insects irrespective of their population density.
    • C) Increased competition for nesting cavities lowers the reproductive output of songbirds.
    • D) A rise in prey abundance causes predators to consume an increasing proportion of the population.
  4. 4.

    Which of the following best describes how limiting factors influence the carrying capacity of a population?

    • A) They determine the maximum stable population size that the environment can sustain.
    • B) They allow populations to exceed exponential growth rates under stable conditions.
    • C) They operate only after a population experiences severe overshooting and collapse.
    • D) They eliminate natural selection by ensuring equal resource distribution among individuals.
  5. 5.

    Which of the following is considered a density-dependent limiting factor that regulates the size of an animal population?

    • A) Increased transmission rates of an infectious parasite in crowded groups
    • B) A flash flood that submerges low-lying burrows across an entire riverbank
    • C) An unseasonal late-spring freeze that lowers ambient temperatures drastically
    • D) A severe drought that reduces the total amount of available water in a watershed

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