Proof of the origin of multicellular organisms from unicellular organisms is ..

Various structural features of unicellular and multicellular organisms can serve as evidence. Multicellular and unicellular organisms have the same organelles in their cells. This is the main evidence for the evolution of unicellular organisms. Over time, unicellular organisms united into groups and created a kind of symbiosis. This symbiosis was the reason for the emergence of multicellular organisms. It took hundreds of thousands of years until a random mutation of unicellular organisms occurred. Further, the evolutionary process began to accelerate.