Organisms without nucleus and cell organelles belong to:
(i) Fungi
(ii) Protista
(iii) Cyanobacteria
(iv) Archaebacteria
Cyanobacteria and archaebacteria both belong to the Kingdom Monera and the members of Kingdom Monera are prokaryotes, that is, they have a primitive nucleus, no membrane bound organelles and ribosomes of 70s type.