Biological Classification
Kerala Board · Class 11 · Biology
Summary of Biological Classification for Kerala Board Class 11 Biology. Key concepts, important points, and chapter overview.
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Overview
Biological classification is the systematic arrangement of living organisms into groups based on their similarities and differences. Since ancient times, humans have attempted to classify organisms for practical purposes like food, shelter, and medicine. This chapter explores how classification syst
Key Concepts
Contains all prokaryotic organisms (bacteria
Contains all prokaryotic organisms (bacteria and archaebacteria). These are the simplest cellular organisms with no true nucleus or membrane-bound org
Includes all single
Includes all single-celled eukaryotic organisms with a well-defined nucleus and membrane-bound organelles. This kingdom contains diverse groups like c
Heterotrophic eukaryotic organisms with chitin cell
Heterotrophic eukaryotic organisms with chitin cell walls. Most are multicellular with thread-like structures called hyphae forming a mycelium. They r
Linnaeus proposed a Two Kingdom system
Linnaeus proposed a Two Kingdom system (Plantae and Animalia) based on simple characteristics. Whittaker's Five Kingdom system uses multiple criteria:
Viruses are non
Viruses are non-cellular entities with genetic material (DNA or RNA) enclosed in a protein coat. They are obligate parasites that can only reproduce i
Learning Objectives
- Understand the historical development of classification systems from Aristotle to Whittaker
- Learn the criteria used for biological classification including cell structure, body organization, and mode of nutrition
- Study the characteristics and examples of the Five Kingdoms: Monera, Protista, Fungi, Plantae, and Animalia
- Analyze the diversity within each kingdom and understand their ecological roles
- Explore organisms not included in the five kingdom system like viruses, viroids, prions, and lichens
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Sources & Official References
- Kerala Board of Public Examinations — keralapareekshabhavan.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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