Interactions in ecosystems

Symbiosis involves an exchange of

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What is mutualism?

• a relationship where both organisms benefit

• a relationship where one organism benefits

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

• all of the above

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A relationship where one organism benefits and the other doesn't, but is not harmed is called:

• mutualism

• commensalism

• parasitism

• optimism

What is a parasite?

• something that can help you

• something that doesn't help or harm you

• something that can harm you

• none of the above

Which of these is an example of a cooperative relationship?

• cheetahs catching deer

• lions and hyenas fighting over meat

• elephants raising their young together

• mosquitos biting you

Why is the predator-prey relationship important?

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Trees compete for ________ in a competitive relationship.

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