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Revision Notes

The Living World

ICSE · Class 11 · Biology

Quick revision notes for The Living World — ICSE Class 11 Biology. Key concepts, formulas, and definitions for last-minute revision.

103 questions40 flashcards5 concepts

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An infographic illustrating the key characteristics of living organisms (growth, reproduction, metabolism, cellular organization, consciousness) and clearly distinguishing between defining and non-def
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Key Topics to Revise

1

1. Nature of Living Organisms

  • Living organisms are self-replicating, evolving and self-regulating interactive systems capable of responding to external stimuli.
  • Living substance is made of macromolecules such as proteins, lipids, nucleic acids and polysaccharides, along with smaller organic and inorganic molecules.
  • All living forms show certain characteristics, but not every characteristic is defining for all living beings.
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2. Classification, Taxonomy and Systematics

  • Classification groups living organisms into identifiable groups or categories based on observable characters.
  • Taxa is the scientific term for categories used in classification.
  • Classification helps organize the huge diversity of plants and animals, makes identification easier, shows evolutionary relationships, helps interpret fossils, and allows comparison of unknown organis
3

3. Concept of Species

  • Species is a natural population of individuals which resemble one another in all essential morphological and reproductive characters.
  • Members of a species can interbreed freely and produce fertile offspring.
  • Species are the basic units of classification.
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4. Binomial Nomenclature

  • The binomial system of nomenclature was first introduced in 1753 by Carl von Linne, known as Linnaeus, in Systema Naturae.
  • A scientific name has two Latin or Latinised words: the first is the generic name and the second is the specific epithet.
  • The generic name begins with a capital letter; the specific epithet begins with a lowercase letter.

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Full Notes

Key Concepts

A living organism is a selfMetabolismClassification is the grouping of livingTaxonomy deals with identificationSpecies is a natural population

Frequently Asked Questions

What are the important topics in The Living World for ICSE Class 11 Biology?
Key topics in The Living World include The Living World - Complete Concept Overview, Mind map showing the first five major characteristics of living organisms with their sub-categories and features, Mind map showing the remaining four major characteristics of living organisms with their features and types. These are the concepts ICSE Class 11 examiners draw on most — study them first, then practise related questions.
How to score full marks in The Living World — ICSE Class 11 Biology?
Understand the core concepts first, then work through the 103 practice questions available for this chapter. Revise formulas and 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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