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Bio Lab

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Q1. What is the carrying capacity for moose in the simulation model of Isle Royale, prior to any changes in the weather?
Carrying capacity of moose is the maximum number of individuals of that species that the local environment can support at that particular time and weather. The graph for this is explained as it increases and then levels out. The moose first increased in population when introduced to the island and then the population growth became stable.
Q2. Based on your data, if you added 500 moose to the Isle Royale population in the simulation, without any wolves present and with a normal growing season, and then you waited 50 years, the moose population size would be approximately: 600
Q3. When the wolves arrived on Isle Royale, what did they find?

A small population of well-fed moose
A small population of underfed moose
A large population of well-fed moose
A large population of underfed moose
Q4. Based on what you've learned in this lab by investigating moose and wolf population cycles, which graph above best represents a predator-prey system, and which curve describes dynamics for the predator species?

The graph on the left is the best representation, and the predator's curve is blue.
The graph on the left is the best representation, and the predator's curve is red.
The graph on the right is the best representation, and the predator's curve is blue.
The graph on the right is the best representation, and the predator's curve is red.
Q5. What does the carrying capacity for moose on the island primarily depend on?

The number of moose
The number of wolves
The rate of plant growth
All of the above
Q6. How does the average fat stores for moose when there are no wolves on Isle Royale compare to average fat stores when there are many wolves?

When there are many wolves, average fat stores is lower.
When there are many wolves, average fat stores is higher.
Average fat stores is not related to wolf presence.
It depends on how many wolves were initially introduced.
Q7. How will the population of birds change over the first few years?

The population will grow steadily, gaining a constant number of birds each year.
The population will grow more and more rapidly with each passing year.
The population will grow steadily for a few years and then shrink steadily back to zero.
The population's growth in the first few years will depend on the size of the city.
Q8. Imagine that after the birds have been living in the city for many years a second, big flock of birds arrives. How do you think the bird population will grow (or shrink) in the 10 to 20 years after the extra birds arrive? Choose the graph that best represents how you expect the city's bird population to change over time in this scenario.
Stable, sharp spike, and then return to previous stable.
Q9. Wolves were hunted to extinction about a century ago in the eastern U.S. and Canada. Recently, wild wolves have made a return to eastern Canada. Wolves eat deer in this area, which otherwise have few natural predators. Based on your results in this lab, which is the best prediction for how the deer population will be affected by the return of wolves?

Wolf predation will lead to a smaller population of healthier deer, because more resources will be available for each surviving deer.
Wolf predation will lead to a smaller population of less healthy deer, because deer will waste time and energy avoiding wolves.
Wolf predation will lead to a smaller population of deer that have about the same level of health as before, because wolves will lower the carrying capacity for deer.
Wolf predation will lead to a larger population of healthier deer, because wolves prey on the less healthy deer, al
Q10. Which of the following is the best explanation for why extinctions are more likely with longer growing seasons in this simulation of Isle Royale?

With more plants available:

moose are healthier on average and can avoid wolves, leading to extinction of the wolves. moose no longer have a carrying capacity, so their population cycles are much more variable, and therefore their population size is more likely to hit zero (extinction) by chance. there is not enough room for moose to move around the island looking for food, leading to extinction of the moose and then the wolves. moose and then wolf populations grow larger during cycle peaks. If there are enough wolves, they eat all the moose, leading to extinction of both species. lowing the deer population to thrive.…...

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