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Five Kingdom Classification Proposed by R.H Whittaker (1969)

Criterion for classification: Proposed by  R.H Whittaker (1969)
a) Complexity of cell structure: prokaryotic and Eukaryotic 
b) Complexity of organisms: Unicellular or multicellular 
c) Mode of nutrition: Plantae (autotrophs), Fungi (heterotrophs and saprobic  absorption, Animalia (heterotrophs and ingestion) 
d) Life style: Producers (Plantae), Consumers (Animalia), Decomposers (Fungi)
e) Phylogentic relationships: prokaryotes to eukaryotes, unicellular to multicellular organisms

1. Kingdom Monera :Bacteria, Cyano bacteria (Blue green algae)  
Cell structure: Unicelled prokaryotes
Nutrition: Absorptive or photosynthetic
Movement: By flagella (tubulin)
Reproduction: Asexual


2. Kingdom Protista (protozoans
Phytoplankton, Zooplankton )
Cell structure :Unicelled eukaryotes
Nutrition :Absorptive, photosynthetic
Movement :By flagella, cilia, streaming
Reproduction: Both asexual and sexual
3. Kingdom Fungi : Yeasts(Unicellular) moulds, mushrooms.
Multicelled eukaryotes
Cell structure :Chitinous cell wall
Nutrition :heterotrophic, Absorptive, Saprobic
Movement : Non-motile
Reproduction: Both asexual and sexual
4. Kingdom Plantae (Algae, Bryophytes, ferns, gymnosperms, Multicelled eukaryotes)
Cell structure: cellulosic cell wall, presence of plastids
Nutrition :Autotrophic
Movement :Non-motile
Reproduction :Both asexual and sexual
5. Kingdom Animalia (Sponges, Invertebrates, vertebrates ,Multicelled eukaryotes)
Cell structure :without cell wall, and plastids
Nutrition :Heterotrophic
Movement :Highly motile
Reproduction: Both asexual and sexual
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