What is the criteria used by Whittaker for classification?
(1) Cell structure
(2) Thallus organization
(3) Mode of nutrition
(4) Reproduction
(5) Phylogenetic relationship
(6) Biochemical difference
(7) Physiological character
Text Solution
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R.H. Whittaker proposed the Five Kingdom Classification system in 1969. His classification was based on five specific criteria:
Cell structure: Distinguishing between prokaryotic and eukaryotic cells.
Thallus organization: Also referred to as body organization or complexity of body structure (unicellular vs. multicellular).
Mode of nutrition: Differentiating between autotrophs (plants), saprophytes (fungi), and heterotrophs (animals).
Reproduction: Considering the methods and modes of reproduction.
Phylogenetic relationship: Analyzing evolutionary history and ancestral connections.
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