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levels
levels of organization
Term | Definition |
---|---|
Atoms | The smallest part of a cell |
Molecules | Made of one or more atoms bonded (stuck) together |
Oraganelles | Composed of molecules,and carry out specific functions for each cell |
Cells | Smallest functional unit of life. All living organisms are composed of one or more cells |
Tissues | Make up the second level of organization. They are formed by joining of the cells that have similar function or structure |
Organs | A group of tissues that perform a specific function or group of functions. (example=the heart) |
Organ system | A collection of organs that work together to perform a specific function. (example:the digestive system) |
Organism | A living thing that's able to perform simple acts of survival (example=humans,plants,bacteria) |
Population | A group of organisms of the same species.(example=wolves) |
Community | A group of interacting species sharing a populated environment.(example=wolves,rabbits,and grass living in the same area) |
Ecosystem | Has organisms but also includes the land,water,air,rocks,and other non-living things in the area. |
Biome | A major regional or global community that is made of similar ecosystems (example=rainforest,tundra,desert) |