Final answer:
The statement is false; unicellular organisms consist of only one cell, while multicellular organisms are made up of many specialized cells forming tissues and organ systems.
Step-by-step explanation:
The statement “Unicellular organisms have more than one cell” is false. Unicellular organisms consist of a single cell, performing all the necessary functions of life within that one cell. In contrast, multicellular organisms are comprised of many cells, often specialized and organized into tissues and organ systems. This complexity allows for more intricate and varied functions than those possible in unicellular organisms. As organisms become multicellular, they exhibit properties such as compartmentalization, the specialization of cell types, and the formation of complex structures like tissues and organs, which facilitate communication and coordination among cells across larger distances compared to unicellular organisms.