Relationships in Ecosystems

True or False: The population size of predators are equal to the population size of prey.

• True

• False

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Any relationship in which two different species use each other to live is called _________________.

• Predation

• Symbiosis

• Competition

• Harmony

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NGSS.MS-LS2-2

______________ occurs when one organism captures and feeds on another organism.

• Predation

• Symbiosis

• Competition

• Dependent

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When two or more individuals or populations attempt to obtain a single resource.

• Competition

• Mutualism

• Symbiosis

• Commensalism

An interaction between organisms or species that is helpful to both.

• Predation

• Commensalism

• Mutualism

• Parasitism

Which is an example of parasitism?

• Shark and seal

• Flea and dog

• Deer and grass

• Seagull and fish

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NGSS.MS-LS2-2

Describes how all the living and nonliving things in an area interact.

• Competition

• Symbiosis

• Dependent

• Ecosystem

What is an example of a predator–prey relationship?

• Bacteria and humans

• Fox and rabbit

• Tick and deer

• Lion and hyena

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An organism that is "hunted" and "eaten" as food is called ______________________.

• Prey

• Predator

• Host

• Parasite

Which is an example of a symbiotic (mutualistic) relationship?

• Cow and grass

• Bird and butterfly

• Cat and mouse

• Bee and flower

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