<P> The differences between fungi and other organisms regarded as plants had long been recognised by some ; Haeckel had moved the fungi out of Plantae into Protista after his original classification , but was largely ignored in this separation by scientists of his time . Robert Whittaker recognized an additional kingdom for the Fungi . The resulting five - kingdom system , proposed in 1969 by Whittaker , has become a popular standard and with some refinement is still used in many works and forms the basis for new multi-kingdom systems . It is based mainly upon differences in nutrition ; his Plantae were mostly multicellular autotrophs , his Animalia multicellular heterotrophs , and his Fungi multicellular saprotrophs . The remaining two kingdoms , Protista and Monera , included unicellular and simple cellular colonies . The five kingdom system may be combined with the two empire system : </P>
<P> The differences between fungi and other organisms regarded as plants had long been recognised by some ; Haeckel had moved the fungi out of Plantae into Protista after his original classification , but was largely ignored in this separation by scientists of his time . Robert Whittaker recognized an additional kingdom for the Fungi . The resulting five - kingdom system , proposed in 1969 by Whittaker , has become a popular standard and with some refinement is still used in many works and forms the basis for new multi-kingdom systems . It is based mainly upon differences in nutrition ; his Plantae were mostly multicellular autotrophs , his Animalia multicellular heterotrophs , and his Fungi multicellular saprotrophs . The remaining two kingdoms , Protista and Monera , included unicellular and simple cellular colonies . The five kingdom system may be combined with the two empire system : </P>
who proposed the five kingdom classification of living organisms
who proposed the five kingdom classification of living organisms
Robert Whittaker
Robert Whittaker