Prokaryotic organisms are not found in which domain?
a) eubacteria.
b) archaea.
c) eukarya.

(c). Eukarya.

Explanation:

Prokaryotes are primitive, single-celled organisms that lacj complex membrane-bound cell organelles, such as nucleus, mitochondria, and endoplasmic reticulum.

Prokaryotes are grouped into two domains, including Archaea and Eubarteria. Archaea includes prokayotes that can live in extreme conditions are known as extremophiles, while domain Eubacteria includes all true bacteria.  

Prokaryotes do belong to domain Eukarya as Eukarya includes all eukaryotic organisms.

Thus, the correct answer is option (C).

a symbiotic relationship with the mitochondria