What does a unicellular organism not have that a multicellular organism does?

Answer 1

A unicellular organism lacks specialized cells and tissues that perform distinct functions, which are characteristic of multicellular organisms. In multicellular organisms, cells are organized into tissues, organs, and systems, allowing for greater complexity and efficiency in processes like respiration, digestion, and reproduction. Additionally, multicellular organisms often exhibit levels of organization that enable them to adapt and respond to their environment more effectively than unicellular organisms.