A small, single-celled organism that has a nucleus

Answer : Prokaryotes are organisms whose cells lack a nucleus and other organelles. Prokaryotes are divided into two distinct groups: the bacteria and the archaea, which scientists believe have unique evolutionary lineages. Most prokaryotes are small, single-celled organisms that have a relatively simple structure.

d ) power this is the right answer

the members of alcoholic anonymous aren't required to disclose their last names.