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Biological Classification Chapter in 15 Minutes | Plus One Biology | PW Kerala

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101 views7likes15:00PWKeralaPlusOneOriginal Release: 2026-07-19

Biological classification organizes living organisms into hierarchical groups based on shared characteristics such as morphology, cell structure, mode of nutrition, and evolutionary relationships. The Three Kingdoms system (proposed by Max) and Five Kingdoms system (proposed by Whittaker) are major classification frameworks. Organisms are classified into kingdoms including Monera (bacteria, cyanobacteria), Protista (unicellular eukaryotes like algae and protozoa), Fungi, Plantae, and Animalia. Each kingdom exhibits distinct features: bacteria include methanogens in extreme environments and photosynthetic cyanobacteria; protists display diverse body forms, colors based on pigments, and reproductive strategies including sexual and vegetative methods; fungi form symbiotic associations with algae; plants and animals show specialized body organization and nutrition modes.