8A Review: Ecosystem Interactions and Factors Quiz

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

• Temperature

• Soil pH

• Plants

• Water

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Identify the abiotic factor from the list below.

• Bacteria

• Sunlight

• Fungi

• Animals

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

• A lion hunting a zebra

• Bees pollinating flowers

• A tapeworm in a human intestine

• A bird eating insects off a buffalo

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NGSS.MS-LS2-2

Explain how temperature as an abiotic factor can influence the distribution of organisms in an ecosystem.

• Temperature affects the availability of water.

• Temperature determines the types of plants that can grow, which in turn affects the animals that can live there.

• Temperature has no effect on organisms.

• Temperature only affects aquatic ecosystems.

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How do decomposers contribute to the biotic factors in an ecosystem?

• They produce oxygen for plants.

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

• They compete with plants for sunlight.

• They provide shelter for small animals.

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Describe how water availability as an abiotic factor can affect plant growth in an ecosystem.

• Water availability has no effect on plant growth.

• Plants require water for photosynthesis, so limited water can restrict plant growth.

• Water availability only affects aquatic plants.

• Plants can grow without water.

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What is the role of sunlight in an ecosystem?

• Sunlight is a biotic factor that provides energy for animals.

• Sunlight is an abiotic factor that provides energy for photosynthesis in plants.

• Sunlight is not important in ecosystems.

• Sunlight only affects desert ecosystems.

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Discuss the importance of symbiotic relationships in maintaining ecosystem stability.

• Symbiotic relationships are rare and have little impact on ecosystems.

• Symbiotic relationships, such as mutualism, commensalism, and parasitism, play crucial roles in maintaining balance and stability by affecting population dynamics and resource distribution.

• Symbiotic relationships only occur in marine ecosystems.

• Symbiotic relationships always harm one of the organisms involved.

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