One difference between prokaryotic and eukaryotic cells is that (a) prokaryotic cells have a nucleus, whereas eukaryotic cells do not. (b) eukaryotic cells have existed on Earth far longer than...

One difference between prokaryotic and eukaryotic cells is that

(a) prokaryotic cells have a nucleus, whereas eukaryotic cells do not.

(b) eukaryotic cells have existed on Earth far longer than prokaryotic cells.

(c) the DNA of eukaryotic cells is found in linear chromosomes, whereas the DNA of prokaryotic cells is found in a single circular chromosome.

(d) eukaryotic cells are usually smaller than prokaryotic cells.