Which of the following is a unicellular eukaryotic organism?
Amoeba
Eukaryotic organisms have a well-defined nucleus. All multicellular organisms are eukaryotic in nature. Plants, animals, mushrooms are all multicellular organisms and eukaryotic. All prokaryotes are unicellular but not all unicellular organisms are prokaryotes. Amoeba is a unicellular organism which belongs to the kingdom Protista which includes unicellular organisms that are eukaryotes.