6. Which of the following describes prokaryotes? a. On average they are larger than eukaryotes.
b. They can be single or multi-cellular.
c. They do not have a nucleus but have other membrane bound organelles.
d. They are less complex than eukaryotes.

c. They do not have a nucleus but have other membrane bound organelles.

Explanation:

Prokaryotes are unicellular organisms that lack organelles or other internal membrane-bound structures. Therefore, they do not have a nucleus, but, instead, generally have a single chromosome: a piece of circular, double-stranded DNA located in an area of the cell called the nucleoid.