Answered

an organism grows in colonies and is composed of eukaryotic cells, in which domain does this organism belong?

Abacteria
Barchaea
Cplanate
Deukarya

Verified Answer :

MissPhiladelphia

I believe the correct answer is option D. The organism belongs to the domain Eukarya since it is a eukaryote. The characteristic feature of this organism would be that they contain membrane-bound organelles and they have a nucleus.