Yellowstone Wolves

When wolves are three weeks old, they eat

• milk

• regurgitated meat

• plants

• willows

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NGSS.MS-LS2-1

A trophic cascade is

• top-level predator

• when the impact of a predator on its prey affects one or more other levels of the food chain

• home environment of and organism

• when species get along

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Why were wolves absent from Yellowstone from the 1920's to 1995?

• There was no prey available, so they starved.

• When all the elk died, the wolves moved to Canada.

• Humans hunted and killed all the wolves in Yellowstone and the surrounding area.

• The wolves migrated south to Texas for a warmer climate.

Tags

NGSS.MS-LS2-4

What is the primary role of wolves in Yellowstone's ecosystem?

• They primarily serve as prey for other larger animals.

• They help control the population of herbivores like elk.

• They are responsible for pollinating plants.

• They primarily feed on plants and berries.

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What impact did the reintroduction of wolves have on the Yellowstone ecosystem?

• It led to a decrease in the number of beavers.

• It caused a significant increase in the elk population.

• It helped restore balance by controlling elk and deer populations.

• It had no significant impact on the ecosystem.

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Why are grey wolves considered important for maintaining the health of Yellowstone's ecosystem?

• They are the only predators in the park.

• They help control the populations of various species.

• They are the largest animals in the park.

• They are the most numerous animals in the park.

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NGSS.MS-LS2-4

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How did the reintroduction of grey wolves affect the elk population in Yellowstone?

• The elk population increased significantly.

• The elk population remained the same.

• The elk population decreased.

• The elk population became extinct.

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What happened to the vegetation in Yellowstone after the reintroduction of grey wolves?

• Vegetation decreased due to overgrazing.

• Vegetation increased due to reduced grazing pressure.

• Vegetation remained unchanged.

• Vegetation was destroyed by wolves.

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What is one way grey wolves help maintain the balance of the ecosystem in Yellowstone?

• By increasing the number of trees

• By controlling the population of herbivores

• By reducing the number of rivers

• By increasing soil erosion

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What is the primary role of grey wolves in the Yellowstone ecosystem?

• Pollinators of plants

• Apex predators

• Decomposers

• Herbivores

Tags

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