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

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

symbiotic relationship in which both organisms benefit

• competition
• Mutualism
• nitrogen fixation
• energy pyramid

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. 

The image provided is an example of a(n):

• Producer
• Autotroph
• Consumer
• Insect

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

• 10%
• 20%
• 80%
• 50%

The nonliving aspects of an ecosystem.

• Abiotic factors
• Biotic factors

The living portions of the ecosystem.

• Biotic factors
• Abiotic factors

Water temperature would be an example of ...

• A biotic factor
• An abiotic factor