Question

which structure is unique to eukaryotic cells?
dna
cell membrane
ribosomes
nucleus

Explanation:

Both prokaryotic and eukaryotic cells have DNA, cell - membranes, and ribosomes. However, a nucleus is a membrane - bound organelle that is unique to eukaryotic cells. Prokaryotic cells do not have a nucleus; their DNA is in the cytoplasm in a region called the nucleoid.

Answer:

nucleus