Ecology Review

Trophic levels are represented by 

• squares

• circles

• pyramids

• lines

In the energy pyramid here, how much of the energy in each level gets lost as heat or used by the organism for survival?

• 80%

• 90%

• 10%

• 20%

The unique position that a species has in the physical use of its habitat and in its function (job) within an ecosystem  

• producer

• biotic factors

• ecosystem

• niche

The arrows in a food chain or web represents what?

• They point to the organism that is being eaten.

• It shows how sunlight flows within an ecosystem.

• They show what direction the energy is flowing between organisms. 

• They represent how water is transferred within a habitat.

An organism that gets energy from breaking down dead organisms, non-living material or waste is a(an) ___________.

• producer

• consumer

• decomposer

• autotroph

An organism that obtains energy by eating other organisms.

• Consumer

• Producer

• Decomposer

• Detriov

Organisms that break down dead or decaying organisms.

• Decomposers

• Producers

• Consumers

Found at the base of a food chain (also known as autotrophs)

• Producers

• Primary Consumer

• Secondary Consumer

• Tertiary Consumer 

Which is the correct order of tropic levels? 

• Primary Consumer, Producer, Secondary Consumer, Tertiary Consumer

• Tertiary Consumer, Primary Consumer, Secondary Consumer, Producer 

• Producer, Primary Consumer, Secondary Consumer, Tertiary Consumer

• Quaternary Consumer, Tertiary Consumer, Secondary Consumer, Producer  

All energy in an ecosystem begins with . . .

• plants

• the Sun

• animals

• energy