Ecosystem Quiz

What is a likely consequence of a decrease in the food resources in an ecosystem?

• Increase in the population size of herbivores

• Decrease in the population size of herbivores

• Increase in the population size of carnivores

• Decrease in competition among herbivores

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What would most likely happen to a fish population if an additional predator, such as a heron, moves into their pond ecosystem?

• The fish population would increase

• The fish population would decrease

• The fish population would remain the same

• The fish would start preying on the heron

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A lamprey attaches itself to a larger fish and sucks the fish’s blood. This is an example of

• Mutualism

• Commensalism

• Parasitism

• Competition

Circle all the abiotic factors

• Bacteria

• A large rock

• Predators

• Water

• Temperature

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Circle all the biotic factors

• Temperature

• A large rock

• Bacteria

• Predators

• Water

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Which of the following factors could lead to an increase in competition within a plant population?

• Increase in sunlight availability

• Decrease in water availability

• Increase in pollinator presence

• Introduction of a new plant species that uses the same resources

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What occurs when two species of birds compete for nesting sites in the same area?

• Both species thrive and expand their populations

• One species may outcompete the other, reducing its population

• The competition creates more nesting sites for both species

• The habitat remains unaffected by the competition

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Which of the following is an example of a biotic factor affecting an ecosystem?

• Variations in temperature throughout the year

• The availability of water in a dry season

• The presence of invasive species competing with native plants

• Changes in sunlight exposure due to seasonal shifts

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A population that has reached the largest number of individuals that the environment can support over a long period of time

• has no limiting factors

• contains only top predators

• has reached its carrying capacity

• has converted from a food chain to a food web

How does an increase in biodiversity benefit human societies?

• It leads to a decrease in available resources

• It can enhance the stability of ecosystems and improve resource availability

• It has no effect on human activities or resources

• It only benefits wildlife and has no impact on humans

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