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PCS Liv Env
Levels of Organization
Term | Definition |
---|---|
biosphere | the part of the Earth that contains all ecosystems (largest level) |
ecosystem | living and non living in area (2nd largest level) |
community | all the species in an area (3rd largest level) |
population | all of one species in an area (4th largest level) |
organism | individual living things (5th largest level) |
tissues | group of cells (6th largest level) |
cells | collection of living matter enclosed by a barrier (7th largest level) |
molecules | group of atoms; smallest unit of most chemical compounds (smallest level) |