ECO REVIEW

Front

What percentage of energy is transferred from one trophic level to the next in an energy pyramid?

Back

About 10% of the energy from the level below it.

Front

What is the difference between density-independent factors and density-dependent factors?

Back

Density-independent factors affect populations regardless of their size, while density-dependent factors are specific to population size.

Front

Which organisms are direct sources of energy for secondary consumers in a food web?

Back

Aphids and Birds.

Front

What is the term for a symbiotic relationship where one organism benefits and the other is harmed?

Back

Parasitism.

Front

What is an ecosystem?

Back

A community of organisms along with their nonliving, abiotic environment.

Front

What is mutualism?

Back

A type of symbiotic relationship where both organisms benefit.

Front

What is commensalism?

Back

A type of symbiotic relationship where one organism benefits and the other is neither helped nor harmed.

Front

What are abiotic factors?

Back

Nonliving components of an ecosystem, such as water, sunlight, and minerals.

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.