Resources in Ecosystems

A group of populations of living things and the nonliving parts of their environment that support them.

• Ecosystem

• Biome

• Biosphere

• Community

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NGSS.MS-LS2-1

On a small island in Lake Erie there is a squirrel population. The squirrels eat berries. How might a large population of berry bushes affect the squirrel population?

• The squirrels will stop eating berries because there are too many.

• The larger populations of berries will have no effect on the squirrel population.

• The larger population of berries will cause an increase in the squirrel population on the island.

• The larger population of berries will cause a decrease in the squirrel population on the island.

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

This graph shows the impact that zebra mussel have on water clarity in a river. Water clarity is a measure of how deeply light can reach into the water. Based on the graph, which statement is true?

• Water clarity is highest closer to the zebra mussel population.

• Water clarity is lowest closer to the zebra mussel population.

• Water clarity is highest farther away from the zebra mussel population.

• Water clarity is lowest at 8 kilometers away from the zebra mussel population.

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

Which of the following is the best example of mutualism?

• a dog steals a bone from another dog

• a tiger hunts and eats a deer

• a bird eats ticks from a zebra's skin

• a bee stings a jogger

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NGSS.MS-LS2-2

Cattle egrets feed in fields among cattle. The egret gets easy access to flying insects stirred up by the cattle, and the cattle don't care if they are there or not. This relationship is an example of

• mutualism

• commensalism

• competition

• parasitism

When this isopod enters the fish through its gills, consumes the fish's tongue, then replaces the tongue, it is acting as a

• predator

• prey

• parasite

• friend

An organism that is killed and eaten by another organism

• Predator

• Prey

• Competition

• Adaptation

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NGSS.MS-LS2-2

A symbiotic relationship in which both organisms benefit is called

• mutualism

• commensalism

• parasitism

A symbiotic relationship in which one organism benefits while the other is harmed is called

• mutualism

• commensalism

• parasitism

Hawks and owls eat the same thing. That relationship is called ___________.

• adaptation

• competition

• parasitism

• mutualism

Tags

NGSS.MS-LS2-2