LS2.A Quiz

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

• Temperature

• Sunlight

• Grass

• Water

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NGSS.MS-LS2-4

What is the primary role of a keystone species in an ecosystem?

• To provide food for all other species

• To maintain the structure and balance of an ecosystem

• To be the most abundant species in the ecosystem

• To be the largest predator in the ecosystem

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NGSS.MS-LS2-5

Which of the following is an example of a symbiotic relationship?

• A lion hunting a zebra

• A bee pollinating a flower

• A tree absorbing sunlight

• A fish swimming in water

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NGSS.MS-LS2-2

How do invasive species typically affect native species in an ecosystem?

• They provide additional food resources

• They increase biodiversity

• They compete with native species for resources

• They have no impact on native species

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Identify the abiotic factor from the following list:

• Fungi

• Soil

• Birds

• Insects

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Which of the following best describes mutualism?

• One organism benefits while the other is harmed

• Both organisms benefit from the relationship

• One organism benefits while the other is unaffected

• Both organisms are harmed

Explain how a keystone species can influence the biodiversity of an ecosystem.

• By being the most numerous species

• By preying on all other species

• By controlling the population of other species, thus maintaining balance

• By being the largest species in the ecosystem

Tags

NGSS.MS-LS2-4

Which of the following is a consequence of introducing an invasive species to an ecosystem?

• Increased food supply for native species

• Decreased competition among native species

• Disruption of existing food webs

• Stabilization of the ecosystem

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What is the difference between commensalism and parasitism?

• In commensalism, both organisms benefit; in parasitism, one benefits and the other is harmed

• In commensalism, one organism benefits and the other is unaffected; in parasitism, one benefits and the other is harmed

• In commensalism, both organisms are harmed; in parasitism, both benefit

• In commensalism, one organism is harmed; in parasitism, both are harmed

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NGSS.MS-LS2-2

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

• A rabbit eating grass

• A tree providing shade for a plant

• Temperature affecting the growth rate of bacteria

• A bird building a nest in a tree

Tags

NGSS.MS-LS2-4