Relationships in Ecosystems

What is an ecosystem?

• All of the living organisms in an area

• All of the nonliving parts of an area

• All of the living and nonliving parts of an area

• An area with no people

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I am a living thing that must use other organisms as food to get energy.

• decomposer
• consumer
• competition
• energy pyramid

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I am the struggle that takes place among organisms for food, water, and others needed to live. 

• competition
• decomposer
• energy pyramid
• producer

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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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Which is an example of parasitism?

• Shark and seal

• Flea and dog

• Deer and grass

• Seagull and fish

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How all the living and nonliving things in an area interact.

• Competition

• Symbiosis

• Dependent

• Ecosystem

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

• Prey

• Predator

• Host

• Parasite

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What is mutualism?

• One organism benefits greatly and the other is not harmed
• One organism benefits while the other is harmed
• Close relationship where both organisms benefit

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A limited supply of food and shelter in the same habitat will lead to -

• mutualism
• parasitism
• competition
• environmental changes

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What is the type of symbiotic relationship that helps one organism, but does not harm or help the other?

• parasitism
• mutualism
• commensalism
• symbiosis