Relationships in Ecosystems

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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NGSS.MS-LS2-2

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 organism that is harmed in a parasitic relationship?

• parasite
• host
• consumer
• producer

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

• parasitism
• mutualism
• commensalism
• symbiosis

Fleas and ticks are examples of what?

• predators
• prey
• hosts
• parasites

What is a predator?

• Neither
• An organism that is consumed
• An organism that does the consuming

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NGSS.MS-LS2-2

What is prey?

• An organism that is consumed
• An organism that consumes
• neither

Plants need light, water, and carbon dioxide for photosynthesis.  This is an example of an organism interacting with -

• biotic factors
• food webs
• abiotic factors
• dominant factors

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NGSS.MS-LS1-6

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Which of these populations is most likely to decrease if the number of grasshoppers decreases?

• plants
• frog
• praying mantis
• owl

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An organism that creates its own food through the process of photosynthesis is called a -

• decomposer
• prey
• consumer
• producer

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NGSS.MS-LS1-6

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