The correct statement about both unicellular and multicellular organisms is:
Both have DNA.
Unicellular organisms (like bacteria and yeast) and multicellular organisms (like plants and animals) both contain DNA, which is essential for storing genetic information and directing cellular processes.
The other statements are not true:
- "Both are the same size" is incorrect as unicellular organisms can vary widely in size, and multicellular organisms are typically much larger.
- "Both can be prokaryotic or eukaryotic" is incorrect because unicellular organisms can be prokaryotic (like bacteria) or eukaryotic (like protists), but multicellular organisms are exclusively eukaryotic.
- "Both are made of multiple cells" is incorrect for unicellular organisms, which consist of a single cell.