Ecosystem Dynamics Test Review

What is a limiting factor in an ecosystem?

• A resource that is abundant

• A factor that allows unlimited growth

• A resource that is lacking and prevents population growth

• A factor that increases population size

When would grass be considered a limiting factor for rabbits?

• When it is abundant

• When it encourages rabbits to grow

• When there is not enough for the rabbit population

• When it increases the rabbit population

What is the term used to describe the maximum population size that an environment can support?

• Growth Limit

• Carrying Capacity

• Resource Limit

• Population Peak

What does the line going up and down in the graph represent?

• Constant population growth

• Fluctuations in population size around the carrying capacity

• A steady decline in population

• Unlimited resources

What might happen to organisms that do not get the resources they need?

• They will thrive

• They may move to get them or they may die

• They will become predators

• They will continue to reproduce

What happens to competition when there are more resources or fewer organisms in an area?

• There is more competition.

• There is less competition.

• Competition remains the same.

• Competition disappears completely.

Which of the following is a type of symbiotic relationship where both organisms benefit?

• Parasitism

• Commensalism

• Mutualism

• Predation

In which type of symbiotic relationship does one organism benefit while the other is unaffected?

• Mutualism

• Parasitism

• Commensalism

• Competition

What is parasitism?

• A relationship where both organisms benefit

• A relationship where one organism benefits and the other is harmed

• A relationship where neither organism benefits

• A relationship where both organisms are harmed

What is commensalism?

• A relationship where both species benefit

• A relationship where one species benefits and the other is unaffected

• A relationship where one species is harmed

• A relationship where both species are harmed