The statement that is true about both unicellular and multicellular organisms is: "Both have DNA."
Unicellular organisms (like bacteria and some protists) and multicellular organisms (like plants, animals, and fungi) both contain DNA as their genetic material. The other statements are not correct:
- Unicellular organisms are made of only one cell, while multicellular organisms are made of multiple cells.
- Unicellular organisms are generally prokaryotic (like bacteria) or eukaryotic (like yeast), whereas multicellular organisms are primarily eukaryotic (except for some exceptions in complex life cycles).
- They are not necessarily the same size, as multicellular organisms can be significantly larger than unicellular ones.