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Revision Notes

Classification of Living Organisms

NIOS · Class 10 · Science & Tech

Quick revision notes for Classification of Living Organisms — NIOS Class 10 Science & Tech. Key concepts, formulas, and definitions for last-minute revision.

44 questions32 flashcards5 concepts

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An illustration showing the three levels of biodiversity: Ecological/Ecosystem diversity (e.g., forest, desert, aquatic), Species diversity (e.g., different species within a forest), and Genetic diver
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Key Topics to Revise

1

1. Biodiversity and Its Levels

  • Earth is the only planet in our solar system of eight planets on which life exists.
  • Every organism begins life as a single cell.
  • Biodiversity means the enormous variety of organisms.
2

2. Classification, Taxonomy, and Hierarchy

  • Classification is grouping organisms according to similarities and differences.
  • Classification is also termed systematics, and the science of classification is termed taxonomy.
  • Classification shows evolutionary relationships among organisms.
3

3. Three Domains of Life

  • All organisms are classified into three major domains.
  • Archaebacteria are thermophilic or heat loving bacteria that live in high temperature vents.
  • Certain bacteria live in oceanic vents at temperatures as high as 80°C to 110°C.
4

4. Five Kingdom Classification

  • Whittaker in 1969 suggested that bacteria should not be in plant kingdom and protozoa not in animal kingdom.
  • Whittaker gave the five kingdom classification.
  • The five kingdoms are Monera, Protoctista or Protista, Fungi, Plantae, and Animalia.

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Full Notes

Key Concepts

Biodiversity is the enormous varietyThree levels of biodiversity are recognisedA species is a groupClassification is the grouping of organismsThe classification hierarchy is Kingdom

Frequently Asked Questions

What are the important topics in Classification of Living Organisms for NIOS Class 10 Science & Tech?
Key topics in Classification of Living Organisms include Biodiversity and Classification Overview, Classification of Living Organisms - Chapter Overview, Biodiversity Concept Overview. These are the concepts NIOS Class 10 examiners draw on most — study them first, then practise related questions.
How to score full marks in Classification of Living Organisms — NIOS Class 10 Science & Tech?
Understand the core concepts first, then work through the 44 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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