6.12ABC & 6.13C Ecosystems

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

• A lion hunting a zebra

• A bee pollinating a flower

• A tick feeding on a dog

• A bird eating seeds

True or False: In a desert ecosystem, the availability of water is an abiotic factor that organisms compete for.

• True

• False

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which of the following best describes a commensal relationship?

• Both organisms benefit

• One organism benefits, the other is harmed

• One organism benefits, the other is unaffected

• Both organisms are harmed

In a forest ecosystem, which of the following is a biotic factor that organisms might compete for?

• Sunlight

• Water

• Soil nutrients

• Food

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NGSS.MS-LS2-1

Describe how a variation in fur color within a rabbit population might be an advantage in a changing environment.

• Dark fur absorbs more sunlight, keeping rabbits warmer in cold climates.

• Light fur helps rabbits blend into snowy environments, avoiding predators.

• Both A and B

• Neither A nor B

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NGSS.MS-LS4-4

How might a decrease in the availability of light affect a plant population in a forest?

• Increase in plant growth

• Decrease in plant growth

• No effect on plant growth

• Plants will change color

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NGSS.MS-LS1-5

NGSS.MS-LS2-1

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

• Grass

• Temperature

• Deer

• Bacteria

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NGSS.MS-LS2-3

Which of the following is a disadvantage of having a large population in a limited environment?

• Increased genetic diversity

• More resources available

• Increased competition for resources

• Less competition for resources

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

What is the primary reason for competition among organisms in an ecosystem?

• Abundance of resources

• Limited resources

• Lack of predators

• Stable environment

Tags

NGSS.MS-LS2-1

Which of the following is an example of parasitism?

• A bird eating seeds

• A tick feeding on a dog

• A bee pollinating a flower

• A fish swimming in a pond