I believe archaea are unicellular, but I'm not completely sure.
yes
Chlamydia is unicellular
Unicellular
Both
unicellular
It is multicelluar plant.
Multicellular
definitely multicelular
All bacteriums are unicellular prokaryotics.
Yes. Archaea are always unicellular.
Archaea are single-celled (unicellular).
unicellular