•Population – group of individuals of same species living in an area. •Community – all organisms of all species that live in an area. •Ecosystem – above plus abiotic factors. •Biosphere – sum of all ecosystems.
•Population – group of individuals of same species living in an area.•Community – all organisms of all species that live in an area.•Ecosystem – above plus abiotic factors.•Biosphere – sum of all ecosystems.