Chapter 8 of 19
Revision Notes
Five Kingdom Classification — Revision Notes
ICSE · Class 9 · Biology
Five Kingdom Classification revision notes for ICSE Class 9 Biology: 4 topics in quick points. Part of the ICSE Class 9 Biology syllabus.
41 questions40 flashcards5 concepts
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Key Topics to Revise
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1. Levels of Classification
- The taxonomic hierarchy from highest to lowest is: Kingdom → Phylum → Class → Order → Family → Genus → Species.
- Species is the lowest category and kingdom is the largest division of living beings.
- All individuals of a species can normally interbreed among themselves.
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2. Species and Scientific Naming
- Species means an organism of a particular kind whose members can interbreed among themselves to produce fertile young ones.
- All house cats belong to one species: Felis domesticus.
- All mankind belongs to one species: Homo sapiens.
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3. Drawbacks of the Old Two-Kingdom Classification
- The old classification divided living organisms into Plantae and Animalia.
- Bacteria and fungi are not plants because they have no chlorophyll and do not carry out photosynthesis.
- Some unicellular organisms such as Euglena cannot be called only plant or only animal.
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4. The Five Kingdoms
- The five kingdoms are Monera, Protista, Fungi, Plantae and Animalia.
- Monera organisms are unicellular and prokaryotic.
- Monera have no organized nucleus and no membrane-bound organelles.
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Full NotesKey Concepts
Species is the lowest basic categoryThe category levels of diversityLinnaeus divided living organisms into PlantaeMonera includes unicellular prokaryotic organismsProtista includes unicellular eukaryotic organisms
Frequently Asked Questions
What are the important topics in Five Kingdom Classification for ICSE Class 9 Biology?
Key topics in Five Kingdom Classification include Levels of Classification, Species and Scientific Naming, Drawbacks of the Old Two-Kingdom Classification, The Five Kingdoms. Study these first, then practise questions on each for Class 9 exams.
How should I revise Five Kingdom Classification for Class 9 exams?
Learn the core ideas first, then work through the 41 practice questions on Five Kingdom Classification. Revise definitions regularly and use flashcards for quick recall before the exam.
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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