Here's a breakdown of the levels from least to most inclusive:
* Atom: The most basic unit of matter.
* Molecule: Two or more atoms bonded together.
* Organelle: A specialized structure within a cell (e.g., mitochondria, nucleus).
* Cell: The fundamental unit of life.
* Tissue: A group of similar cells working together.
* Organ: A structure composed of different tissues working together.
* Organ System: A group of organs that work together to carry out a major function.
* Organism: A complete living being.
* Population: A group of individuals of the same species living in the same area.
* Community: All the different populations living in a particular area.
* Ecosystem: All the living organisms in a particular area and their interactions with the non-living environment.
* Biosphere: The entire portion of Earth inhabited by life.
The biosphere encompasses all of the other levels of biological organization, including all ecosystems, organisms, and their interactions with the environment.
