Which of the following statements regarding the five-kingdom classification system, as proposed by R. H. Whittaker, is incorrect?
- AThe main criterion for classification included cell structure, thallus organization, mode of nutrition, reproduction, and phylogenetic relationships.
- BFungi are heterotrophic organisms with a cell wall primarily composed of chitin.
- CKingdom Protista includes all unicellular eukaryotic organisms, some of which possess flagella or cilia.
- DAll prokaryotic organisms were grouped together in the Kingdom Monera, which is exclusively autotrophic in its mode of nutrition.
✓ Correct answer: D
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