The Role of Wolves in Yellowstone

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

• Pollinators of plants

• Apex predators

• Decomposers

• Herbivores

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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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Which of the following is a direct impact of grey wolves on their prey populations?

• Increased birth rates of prey

• Decreased competition among prey

• Controlled population size of prey

• Increased migration of prey

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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 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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How do grey wolves indirectly benefit other animal species in Yellowstone?

• By providing them with food

• By creating more water sources

• By reducing competition for food

• By increasing the number of predators

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What is the term used to describe species like grey wolves that have a large impact on their ecosystem?

• Invasive species

• Keystone species

• Endangered species

• Migratory species

Which of the following is a consequence of the absence of grey wolves in an ecosystem?

• Increased biodiversity

• Overpopulation of prey species

• Decreased plant growth

• More predators

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What effect did the reintroduction of grey wolves have on the riverbanks in Yellowstone?

• Riverbanks eroded more quickly.

• Riverbanks became more stable.

• Riverbanks dried up.

• Riverbanks were unaffected.

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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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