The main criteria used for Five Kingdom Classification proposed By R.H. Whittaker (1969) included: A. Cell structure B. Body organization C. Presence of flagellum D. Reproduction E. Phylogenetic relationships Choose the correct answer from the options given below :

Core Logic

R.H. Whittaker (1969) proposed a Five Kingdom Classification. The main criteria he used for classification were:

• Cell structure (prokaryotic vs eukaryotic)
• Body organization (unicellular vs multicellular)
• Mode of nutrition (autotrophic vs heterotrophic)
• Reproduction
• Phylogenetic relationships (evolutionary history)

'Presence of flagellum' was not a primary criterion used for his five-kingdom division.

Step 1: Final Conclusion

Therefore, A, B, D, and E are the correct criteria from the given list.

Pattern Recognition

Flagellum presence (C) is a microscopic detail used in lower taxonomy, not the macro-level criteria Whittaker used for kingdoms. Eliminating C removes options 2 and 4.

Chapter Mix

Class 11 Biology: Biological Classification