Ecological Limiting Factors Quiz
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Questions and Answers

What is the main reason why the meadows and forests of the eastern United States are not literally hopping with rabbits and toads?

  • The overpopulation of predators such as hawks and snakes in these areas.
  • The absence of suitable habitat for rabbits and toads to thrive.
  • The scarcity of water bodies for toads to lay their eggs.
  • The presence of limiting factors such as food, shelter, breeding sites, and predators. (correct)

    • What do cottontail rabbits and American toads have in common with regards to their survival?

  • Both are immune to most of the density-dependent factors that limit other animal populations.
  • Both have a natural ability to defend themselves against predators like hawks and snakes.
  • Both require specific resources such as food, water, and suitable habitats to survive and reproduce. (correct)
  • Both can reproduce at a much faster rate than other animals in the eastern United States.

    • What is the distinction between density-dependent factors and density-independent factors?

  • Density-dependent factors include predators and diseases, while density-independent factors include food availability and breeding sites.
  • Density-dependent factors have an impact on the population regardless of its size, while density-independent factors are influenced by the population's size.
  • Density-dependent factors are affected by climatic conditions, while density-independent factors are related to biotic interactions.
  • Density-dependent factors are influenced by the number of individuals in a population, while density-independent factors are unrelated to population size. (correct)

    • Why do cottontail rabbits and American toads face potentially deadly dangers despite avoiding predators like hawks and snakes?

    <p>They face other potentially deadly dangers such as diseases, forest fires, and drought.</p> Signup and view all the answers

    Which of the following factors are considered density-independent limiting factors?

    <p>Hurricanes and pollutants</p> Signup and view all the answers

    What is an example of a density-dependent limiting factor mentioned in the text?

    <p>The boom-and-bust cycle of collared lemming population</p> Signup and view all the answers

    What is the impact of adding new nest sites for mountain chickadees, as mentioned in the text?

    <p>It causes a significant increase in the nesting population</p> Signup and view all the answers

    What happens to the lemming population after the stoat population has had time to grow to greater numbers?

    <p>The lemming population crashes</p> Signup and view all the answers

    What does it mean when a population has reached the 'carrying capacity' of the ecosystem?

    <p>The population growth slows and then stops</p> Signup and view all the answers

    Which statement best describes density-independent limiting factors?

    <p>They are nonliving factors that affect all populations regardless of density.</p> Signup and view all the answers

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