Competitive Exclusion

When put together, one organism outcompetes the other for resources.  This is an example of:

• competitive exclusion principle

• speciation

• biological niche

• evolution

Answer explanation

When one organism outcompetes another for resources, it is an example of the competitive exclusion principle.

Tags

NGSS.MS-LS2-1

two species cannot coexist in the same ecological niche for very long without one becoming extinct or being driven out because of competition for limited resources

• predation

• competitive exclusion principle

• population density

• biodiversity

Answer explanation

The competitive exclusion principle states that two species cannot coexist in the same ecological niche for long without one becoming extinct or being driven out due to competition for limited resources.

The ecological niches of three bird species are shown in the diagram. What is the advantage of each bird species having a different niche?

• As more birds feed higher in the tree, available energy increases.

• More abiotic resources are available for each bird.

• Predators are less likely to feed on birds in a variety of locations.

• There is less competition for food.

Answer explanation

Having different niches reduces competition for food.

Tags

NGSS.MS-LS2-1

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What happens when two species have overlapping niches?

• The two species will learn how to cooperate with each other.

• Increase in population size for both species.

• Competition for resources and potential decrease in population size or loss of one species in that ecosystem.

• There is no effect or impact on the population size or survival of either species.

Answer explanation

When two species have overlapping niches, they compete for resources, potentially leading to a decrease in population size or loss of one species in the ecosystem.

Tags

NGSS.MS-LS2-2

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How does competition affect species diversity?

• It increases species diversity.

• It promotes species diversity.

• It has no effect on species diversity.

• It reduces species diversity.

Answer explanation

Competition reduces species diversity by favoring dominant species over others.

Tags

NGSS.MS-LS2-2

The relationship that exists between two organisms when they attempt to obtain the same resource.

• Competition

• Disturbance

• Mimicry

• Predation

Answer explanation

Competition is the relationship between organisms when they compete for the same resource.

What is the competitive exclusion principle?

• Two species can coexist indefinitely in the same niche.

• Two species cannot coexist in the same niche indefinitely.

• Species can share resources equally.

• Species evolve to avoid competition.

Tags

NGSS.MS-LS2-2

Which of the following is an example of competitive exclusion?

• Two bird species feeding on different parts of the same tree.

• Two fish species living in different parts of a lake.

• One species of lizard outcompeting another for the same food source.

• Two plant species growing in different soil types.

What is a likely outcome when two species compete for the same limited resource?

• Both species will thrive.

• One species will outcompete the other.

• Both species will go extinct.

• The resource will become unlimited.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

How does competitive exclusion influence evolution?

• It leads to the extinction of all competing species.

• It promotes the evolution of new species.

• It has no impact on evolution.

• It causes species to evolve different niches.

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-4