Ecosystems Review

Which of the following best describes the term "mutualism" in the context of interactions among organisms in ecosystems?

• It refers to an interaction where one organism benefits while the other is harmed.
• It refers to an interaction where both organisms benefit.
• It refers to an interaction where one organism benefits while the other is unaffected.
• It refers to an interaction where both organisms are harmed.

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NGSS.MS-LS2-2

Which of the following is an example of a predatory interaction among organisms in an ecosystem?

• A bee pollinating a flower.
• A lion hunting a zebra.
• A shark cleaning parasites off a fish.
• A squirrel burying nuts for the winter.

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NGSS.MS-LS2-3

Which of the following best describes the flow of energy in an ecosystem?

• The movement of nutrients through biotic and abiotic components of the ecosystem.
• The flow of water through different parts of the ecosystem.
• The exchange of gasses between organisms and the environment.
• The transfer of energy from one organism to another through feeding relationships.

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NGSS.MS-LS2-3

Which of the following is NOT a biotic factor?

• Plants
• Animals
• Rocks
• Bacteria

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NGSS.MS-LS2-4

Which of the following is an example of an abiotic factor?

• Trees
• Fish
• Sunlight
• Birds

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NGSS.MS-LS2-3

What is the primary source of energy for most ecosystems?

• Sunlight
• Soil
• Water
• Wind

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NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which of the following is an example of a decomposer in an ecosystem?

• Rabbit
• Eagle
• Mushroom
• Butterfly

How does a decomposer contribute to the cycling of matter in an ecosystem?

• By breaking down dead organisms and waste materials into simpler nutrients.
• By producing oxygen through photosynthesis.
• By providing energy to other organisms through the process of respiration.
• By capturing sunlight and converting it into chemical energy.

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NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which of the following statements best describes the relationship between producers and consumers in an ecosystem?

• Producers rely on consumers for energy.
• Consumers rely on producers for energy.
• Producers and consumers do not interact in an ecosystem.
• Producers and consumers compete for resources.

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NGSS.MS-LS2-2

NGSS.MS-LS2-3

How does the availability of resources affect the population size of organisms in an ecosystem?

• Lots of resources leads to larger population sizes.
• Lots of resources leads to smaller population sizes.
• Less resources leads to larger population sizes.
• Less resources have no effect on population size.

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NGSS.MS-LS2-1

NGSS.MS-LS2-4