Answer the following question: Fact 1: Prokaryotes are single-celled organisms that lack a nucleus. Fact 2: An organism is a living thing. Given the two facts above, prokaryotes are single celled living things in the animal kingdom that don't have a what?

Options are:
a). epidermal;
b). genus;
c). complex;
d). extinction;
e). food;
f). nucleus;
g). properties;
h). alleles;
Answer:
f).