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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?

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

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

Hurricanes and pollutants Signup and view all the answers

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

The boom-and-bust cycle of collared lemming population Signup and view all the answers

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

It causes a significant increase in the nesting population Signup and view all the answers

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

The lemming population crashes Signup and view all the answers

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

The population growth slows and then stops Signup and view all the answers

Which statement best describes density-independent limiting factors?

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