a unicellular organism has one cell
unicellular_protist is single_cell_organism. unicellular_organism_reproduction_event is cellular_multiplication. unicellular_algae is not single_cell_organism. unicellular_protist is not single_cell_organism. unicellular_organism_reproduction_event is organism_reproduction_event. unicellular_algae is single_cell_organism. unicellular_protist is not protista. unicellular_organism_reproduction_event is not cellular_multiplication. unicellular_organism_reproduction_event is not organism_reproduction_event. unicellular_algae is not algae.