Final answer:
The levels of organization in a multi-cellular organism, from smallest to largest, are cell, tissue, organ, organ system, and organism.
Step-by-step explanation:
- Cell: The smallest structural and functional unit of a multi-cellular organism.
- Tissue: A group of similar cells that work together to perform a specific function.
- Organ: A structure made up of different types of tissues that work together to carry out a particular function.
- Organ system: A group of organs that work together to perform a specific function in the body.
- Organism: The highest level of organization, where all the systems work together to maintain life.
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