Organism - Individual, biotic factor, Ecosystem - where living organisms (biotic) interact with each other and with their physical environment (abiotic)., Population - made up of a group of individuals of a given species living in a specific geographical area at a given time and functioning as a unit of biotic community., Community - includes populations of organisms (biotic only) of different species.,

Levels of Ecosystems

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恢復自動保存: ?