Ernst Haeckel gave the Eukaryotic in 1866 AD.
Ernst Haeckel gave the Kingdom-Protista in 1866 AD.
Ernst Haeckel gave the Unicellular Organisms in 1866 AD.
When did Ernst Haeckel give the Eukaryotic?
When did Ernst Haeckel give the Kingdom-Protista?
When did Ernst Haeckel give the Unicellular Organisms?