Organism & Their Environment

Front

What are heterotrophs also called?

Back

Consumers

Front

What do arrows in food webs and food chains represent?

Back

Transfer of energy

Front

What is the position of an organism in a food chain or food web called?

Back

Trophic level

Front

Why is only about 10% of the energy available within one trophic level transferred to the next?

Back

Energy is lost at each level in the food chain, energy is used up for movement, and energy is lost through respiration (as heat).

Front

What is an organism that makes its own food called?

Back

Producer

Front

What is the primary source of energy for most ecosystems?

Back

The Sun

Front

What is a food chain?

Back

A linear sequence of organisms through which nutrients and energy pass as one organism eats another.

Front

What is a food web?

Back

A complex network of feeding relationships among various organisms in an ecosystem.

Front

What role do decomposers play in an ecosystem?

Back

They break down dead organic matter, returning nutrients to the soil.

Front

What is a primary consumer?

Back

An organism that eats producers (plants) for energy.