What is characterized by having more than one cell?

Organisms characterized by having more than one cell are known as multicellular organisms. These organisms, such as plants, animals, and fungi, are composed of numerous cells that specialize in different functions, allowing for greater complexity and adaptability. Multicellularity enables the development of tissues and organs, which work together to sustain life. In contrast, unicellular organisms consist of a single cell that performs all necessary life processes.