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