How did the reintroduction of wolves to Yellowstone National Park affect the beaver population?(1 point)
Responses
The wolves increased the population by eating beavers’ predators.
T he wolves increased the population by eating beavers ’ predators.
The wolves increased the population by eating a competitor.
T he wolves increased the population by eating a competitor.
The wolves decreased the population by eating beavers.
T he wolves decreased the population by eating beavers.
The wolves decreased the population by eating beavers’ prey.
T he wolves decreased the population by eating beavers’ prey.
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The correct answer is: The wolves increased the population by eating a competitor.
What happened to Yellowstone National Park when wolves disappeared?(1 point)
Responses
The deer population increased.
The deer population increased.
The bear population increased.
The bear population increased.
The willow tree population increased.
The willow tree population increased.
The grassy areas increased.
The grassy areas increased.
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page 15 of 15
The correct answer is: The deer population increased.
Which food source’s scarcity caused the Yellowstone National Park beaver population to decrease?(1 point)
Responses
willow
willow
otter
otter
grass
grass
fish
fish
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page 15 of 15
The correct answer is: willow
What happens to an ecosystem when the primary consumers disappear?(1 point)
Responses
Both the producer and secondary consumer populations decrease.
Both the producer and secondary consumer populations decrease.
The producer population decreases, while the secondary consumer population increases.
The producer population decreases, while the secondary consumer population increases.
Both the producer and secondary consumer populations increase.
Both the producer and secondary consumer populations increase.
The producer population increases, while the secondary consumer population decreases.
The producer population increases, while the secondary consumer population decreases.
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