Ecology Unit Test Review

How is energy passed through the trophic levels?

• Light

• Heat

• Fire

• Food

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

• carbohydrates
• sunlight
• water
• carbon

What is the term for each step in the transfer of energy and matter within a biological community?

• energy path
• food web
• trophic level
• food pyramid

Autotrophs make up the _______ level in all ecosystems.

• First
• Second
• Third
• Fourth

which symbiosis is this 

• parasitism 
• mutualism
• commensalism
• nonalism 

symbiotic relationship in which both organisms benefit

• competition
• Mutualism
• nitrogen fixation
• energy pyramid

The amount of energy that usually transfers from one trophic level to the next...

• 10%
• 20%
• 80%
• 50%

Which of the following would be the definition of a detritivore?

• Animals that eat insects.
• Organisms that feed on rocks, recycling the nutrients back into the ground.
• Organisms that eat only pants
• Things that feed on dead organisms, recycling the nutrients back into the ground.

The nonliving aspects of an ecosystem.

• Abiotic factors
• Biotic factors

The living portions of the ecosystem.

• Biotic factors
• Abiotic factors