Environmental Factors and Relationships

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

What is a predator?

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

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

• plants
• frog
• praying mantis
• owl

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

• Predation

• Symbiosis

• Competition

• Dependent

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