Final answer:
Multicellular organisms are made up of different types of cells that work together to perform specialized functions. The body of multicellular organisms exhibits organization at multiple levels, including tissues, organs, and organ systems.
Step-by-step explanation:
Multicellular organisms are made up of more than one type of cell and have specialized cells that are grouped together to carry out specialized functions.
The cells of a multicellular organism would not survive as independent cells.
The body of a multicellular organism, such as a tree or a cat, exhibits organization at several levels: tissues, organs, and organ systems.