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Revision Notes
The Living World — Revision Notes
Punjab Board · Class 11 · Biology
The Living World revision notes for Punjab Board Class 11 Biology: 4 topics in quick points. Part of the Punjab Board Class 11 Biology syllabus.
45 questions24 flashcards5 concepts
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Key Topics to Revise
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1. Diversity in the Living World
- Earth is home to an incredibly diverse range of living organisms found in every type of habitat – from cold mountains and hot springs to deep oceans and deserts.
- The total number of known and described species ranges between 1.7 to 1.8 million. This is called BIODIVERSITY.
- Each different kind of plant, animal, or organism is called a SPECIES.
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2. Rules of Binomial Nomenclature
- Biological names are generally in Latin and written in italics.
- They are Latinised or derived from Latin irrespective of their origin.
- The first word (genus) starts with a CAPITAL letter.
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3. Taxonomic Categories and Hierarchy
- Classification is NOT a single-step process – it involves a HIERARCHY of steps called TAXONOMIC HIERARCHY.
- Each step in the hierarchy represents a rank or category called a TAXONOMIC CATEGORY.
- All categories together constitute the TAXONOMIC HIERARCHY.
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4. Taxonomic Table – Key Examples (Table 1.1)
- Human (Man): Biological Name – Homo sapiens | Genus – Homo | Family – Hominidae | Order – Primata | Class – Mammalia | Phylum – Chordata
- Housefly: Biological Name – Musca domestica | Genus – Musca | Family – Muscidae | Order – Diptera | Class – Insecta | Phylum – Arthropoda
- Mango: Biological Name – Mangifera indica | Genus – Mangifera | Family – Anacardiaceae | Order – Sapindales | Class – Dicotyledonae | Division – Angiospermae
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Full NotesKey Concepts
Biodiversity refers to the total numberNomenclature is the standardized systemBinomial nomenclature is a twoIdentification is the process of determiningClassification is the process of grouping
Frequently Asked Questions
What are the important topics in The Living World for Punjab Board Class 11 Biology?
Key topics in The Living World include Diversity in the Living World, Rules of Binomial Nomenclature, Taxonomic Categories and Hierarchy, Taxonomic Table – Key Examples (Table 1.1). Study these first, then practise questions on each for Class 11 exams.
How should I revise The Living World for Class 11 exams?
Learn the core ideas first, then work through the 45 practice questions on The Living World. 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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