Ecosystems and Populations Test Review

Front

What are organisms that need nitrogen to survive?

Back

All living things.

Front

What converts nitrogen gas into a usable form for plants and animals?

Back

Bacteria.

Front

What is the term for the interaction when two species compete for the same resources?

Back

Competition.

Front

How is nitrogen 'fixed' into a usable form for plants?

Back

Through action of bacteria and lightning.

Front

What are temperature, light, air, water, and soil classified as in an ecosystem?

Back

Abiotic factors.

Front

What is the role of bacteria in the nitrogen cycle?

Back

They convert nitrogen gas into a usable form for plants.

Front

What happens to competition levels when a new predator is introduced into an ecosystem?

Back

Competition for resources increases.

Front

What is an example of an abiotic factor in an ecosystem?

Back

Water.

Front

What is mutualism?

Back

A symbiotic relationship where both species benefit.

Front

What is parasitism?

Back

A relationship where one organism benefits at the expense of another.