State any three bases for the classification of organisms into five kingdoms.

(N/A) The classification of organisms into five kingdoms,as proposed by $R$.$H$. Whittaker,is based on the following criteria:
$(a)$ Cell structure: Whether the organism is prokaryotic (lacking a defined nucleus) or eukaryotic (possessing a membrane-bound nucleus).
$(b)$ Body organization: Whether the organism is unicellular (single-celled) or multicellular (complex body structure).
$(c)$ Mode of nutrition: Whether the organism is autotrophic (synthesizing its own food) or heterotrophic (obtaining food from other sources).