Ecosystem Population Dynamics Quiz

What is an example of an abiotic factor?

• Trees

• Water

• Bacteria

• Insects

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Which of the following is a biotic factor?

• Temperature

• Humidity

• Plants

• Rocks

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What does the term "limiting factor" refer to in an ecosystem?

• A factor that promotes unlimited growth of a population

• A factor that has no impact on the population

• A factor that restricts the growth of a population

• A factor that only affects abiotic components

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What is the carrying capacity of an ecosystem?

• The maximum number of individuals that can leave the ecosystem

• The maximum population size that the environment can sustain indefinitely

• The minimum population size for a species to survive

• The number of species that can be introduced into an ecosystem

Which of the following is NOT an abiotic factor?

• Soil pH

• Rainfall

• Fungi

• Sunlight

How can biotic factors influence an ecosystem?

• By changing the chemical composition of the atmosphere

• By altering the physical structure of the ecosystem

• By interacting with other living organisms

• By affecting the Earth's rotation

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Which of the following best describes a limiting factor in a desert ecosystem?

• Sand temperature

• Water availability

• Number of cacti

• Amount of sunlight

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How does carrying capacity affect a population's growth rate?

• It increases the growth rate indefinitely

• It does not affect the growth rate

• It decreases the growth rate as the population reaches carrying capacity

• It only affects the growth rate in aquatic ecosystems

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Which factor is most likely to cause a decrease in an ecosystem's carrying capacity?

• An increase in food availability

• A decrease in predator populations

• A prolonged drought

• An increase in plant growth

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What role do decomposers play in an ecosystem?

• They increase the amount of sunlight that plants can use

• They break down dead organisms, returning nutrients to the soil

• They consume living plants, reducing the amount of biomass

• They regulate the temperature of the ecosystem

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