Front

Any living thing; simplest organization level

Back

Organism

Front

Groups of organisms that share characteristics and can breed with each other.

Back

Species

Front

Organisms of the same species living together at the same time and place.

Back

population

Front

All populations in an area at the same time.

Back

Community

Front

Living and nonliving parts of an environment and their interactions.

Back

ecosystem

Front

A zone that includes Earth's land, water, and the lowest part of the atmosphere where all organisms are found.

Back

biosphere

Front

Nonliving parts of the ecosystem

Back

Abiotic

Front

Living parts of the ecosystem

Back

Biotic

Front

Place where organisms live

Back

Habitat

Front

Organism's role in the ecosystem

Back

niche