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Chapter 15 of 16
Study Plan

Evolution — Study Plan

ICSE · Class 10 · Biology

A step-by-step study plan for Evolution, ICSE Class 10 Biology: what to learn first, what to practise and when to revise.

41 questions32 flashcards5 concepts

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A comparison scene showing the population of light and dark peppered moths on tree trunks in a rural (pre-industrial) and an industrial (post-industrial) environment, illustrating natural selection.
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Study Plan

1
Day 1–2

Learn the Theory

Read the textbook chapter carefully. Note down definitions, formulas and key ideas. Focus on: 1. Basic idea of evolution, 2. Lamarckism, 3. Example of Lamarckism: Long neck of giraffe.

2
Day 3

Practise

Solve the textbook exercises and extra practice questions. There are 41 questions available for this chapter.

3
Day 4

Revise & Test

Revise key points without looking at your notes. Take a practice quiz and mark weak areas for another pass.

4
Day 7

Spaced Revision

Come back to Evolution after a week. Use flashcards for quick recall and try past exam questions on this chapter.

What to Focus On

  • Evolution is slow and gradual.
  • Unicellular organisms appeared before multicellular organisms.
  • More complex forms evolved from simpler forms.
  • Lamarck proposed the first theory explaining evolution.
  • Lamarckism is also called the Theory of Inheritance of Acquired Characters.
  • Use and disuse of organs was central to this theory.
  • Vestigial organs are reduced and non-functional now.
  • Vermiform appendix, wisdom tooth, muscles of ear pinna, and coccyx are vestigial organs.
  • Appendix is linked with the old herbivorous diet of ancestors.

Common Mistakes to Avoid

Acquired characters are inherited by offspring.

Lamarck and Darwin explained evolution in the same way.

Survival of the fittest means the strongest organisms always survive.

Memory Tips

Organic evolution

Sequence in evolution

Lamarckism as use and disuse

Inheritance of acquired characters

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Frequently Asked Questions

What are the important topics in Evolution for ICSE Class 10 Biology?
Key topics in Evolution include Basic idea of evolution, Lamarckism, Example of Lamarckism: Long neck of giraffe, Vestigial organs. Study these first, then practise questions on each for the ICSE Class 10 board exam.
How should I revise Evolution for the ICSE Class 10 board exam?
Learn the core ideas first, then work through the 41 practice questions on Evolution. 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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