6.12 B Interactions in an Ecosystem

What happens to the fox (predator) population when the rabbit (prey) population increases?

• Nothing happens

• When the rabit population increases, the fox population also increases because there is more food for them to eat.

• When the rabit population decreases, the fox population also decreases because there is more food for them to eat.

• Both the rabbit and fox die off and become extinct.

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How does mutualism benefit both the acacia tree and the acacia ants?

• Tree gets nutrient depleted and dies.

• The ants die from the harsh habitat

• No one is hurt or helped.

• In mutualism, the acacia tree provides the ants with housing and food, while the ants protect the tree from predators and destroy competing plants nearby.

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Which are examples of commensalism relationship? (Multiple Correct Answers)

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Match the following

• commensalism

• When one organism benefits and the other is harmed in this symbiotic relationship

• parasitism

• A relationship involving one organism hunting and feeding on another

• symbiosis

• A close relationship where at least one living thing relies on the other

• mutualism

• When both organisms benefit in this symbiotic relationship

• predatory

• When one organism benefits and the other is not impacted in this symbiotic relationship

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How are predatory relationships helpful to the prey?

• Predators only eat sick prey animals.

• The predators limit the prey population to a size the ecosystem can sustain.

• Predators give the prey animals a reason to migrate.

• Predators help prey animals find shelter.

What happens during competition?

• One organism benefits while the other is not harmed.

• Organisms compete for nonliving resources only.

• Organisms compete for living and nonliving resources.

• Only members of the same species experience competition.

 

3. In which form of symbiosis do both organisms benefit?

• 1. predatory

• 1. mutualism

• 1. commensalism

• 1. parasitism

In which relationship does one organism benefit while the other is not harmed or helped?

• competition

• mutualism

• commensalism

• parasitism

Why might overhunting be bad for a predator population?

• It creates more parasitism.

• There is increased competition for fewer food sources.

• There is decreased competition for food sources.

• Disease will be more likely to occur.

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Which best describes mutualism?

• Organisms compete for a limited resource.

• One organism feeds on another.

• Both organisms benefit from the relationship.

• Only one organism benefits from the relationship.

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