Levels of organization

Biome: a large naturally occurring community of flora & fauna occupying a major habitat.

Biosphere: where all living things on earth live.

Ecosystem: interactions among populations in a community & the community's physical surrounding

Organism: anything that posses all the characteristic of life

Population: group of organisms of one species that interbred & live in the same place at the same time

Community: collection of several populations that inhabit a common environment.