Question

which is present only in eukaryotic cells?
a) cell membrane
b) dna
c) chromosomes
d) nucleus

Explanation:

Eukaryotic cells are defined by having a nucleus, while prokaryotic cells lack a true nucleus. Both prokaryotic and eukaryotic cells have a cell - membrane. DNA is present in both types of cells, although its organization differs. Chromosomes are also present in both, but again, their structure and organization vary. The nucleus is a membrane - bound organelle that is unique to eukaryotic cells.

Answer:

D. nucleus