What are the similarities between multicellular and unicellular?

There are a few significant similarities between unicellular and multicellular organisms. Both types of organisms consist of plasma membrane and cytoplasm and both are essential to almost all known ecosystems. Both contain DNA and ribosomes and both exhibit similarity in almost all of life functions and processes such as metabolism and reproduction. A nucleus is present and acts as a control center in both, unicellular and multicellular organisms.