Ecology Test Review

An organism that produces its own food supply from inorganic compounds is called a(an)

• heterotroph
• consumer
• detritivore
• autotroph

What is the original source of almost all energy in most ecosystems?

• carbohydrates
• sunlight
• water
• carbon

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symbiotic relationship in which both organisms benefit

• competition
• Mutualism
• nitrogen fixation
• energy pyramid

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A living relationship between two species in which one organism is harmed is called...

• mutualism
• commensalism
• parasitism
• niche

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What does a food web represent?

• All connections of energy flow throughout all organisms in a habitat.
• The specific ways that mutualism is carried out.
• A single pathway or energy flow between organisms. 
• How carnivores get their food. 

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The nonliving aspects of an ecosystem.

• Abiotic factors
• Biotic factors

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The living portions of the ecosystem.

• Biotic factors
• Abiotic factors

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Water temperature would be an example of ...

• A biotic factor
• An abiotic factor

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A collection of organisms that belong to different populations but all live in the same area and interact with one another.

• Population
• Ecosystem
• Community
• Ecosphere

A collection of organisms that make up a community as well as all of the nonliving aspects of the environment.

• Population
• Community
• Habitat
• Ecosystem

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