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Syllabus

Transpiration — Syllabus

ICSE · Class 10 · Biology

What Transpiration covers in ICSE Class 10 Biology: 4 topics, for the 2026-27 session. Part of the ICSE Class 10 Biology syllabus.

42 questions40 flashcards5 concepts

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A comparison chart highlighting the key differences between transpiration, evaporation, and perspiration in terms of process type, speed, cellular involvement, and primary function.
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4 Topics · ICSE Class 10 Biology · 2026-27

Topics in Transpiration

1

Meaning and Nature of Transpiration

  • Transpiration is the loss of water vapours from aerial parts of a plant.
  • It is a physiological process and is brought about by living cells.
  • Leaves participate most actively in transpiration.
2

Experiments to Demonstrate Transpiration

  • Bell jar method shows water droplets on the inner wall when a plant is kept inside a sealed bell jar in sunlight.
  • The joint between the bell jar and plate is sealed with vaseline, and the pot is covered with polythene to prevent outside water interference.
  • Polythene bag method shows water droplets on the underside of the bag when a leafy branch is enclosed in sunlight.
3

Measurement of Transpiration

  • The rate of transpiration can be measured directly by loss of weight of a leafy shoot.
  • Ganong's potometer measures the rate of transpiration by measuring the water taken up by a leafy shoot.
  • In Ganong's potometer, the narrow bent end is dipped in coloured water and an air bubble is introduced.
4

Types of Transpiration

  • Stomatal transpiration occurs through stomata.
  • Cuticular transpiration occurs through the cuticle.
  • Lenticular transpiration occurs through lenticels.

Key Concepts

Central concept: Transpiration

Definition of transpirationNature of transpirationDemonstration of transpirationMeasurement of transpirationTypes of transpirationStomatal transpirationCuticular transpirationLenticular transpiration

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Frequently Asked Questions

What are the important topics in Transpiration for ICSE Class 10 Biology?
Key topics in Transpiration include Meaning and Nature of Transpiration, Experiments to Demonstrate Transpiration, Measurement of Transpiration, Types of Transpiration. Study these first, then practise questions on each for the ICSE Class 10 board exam.
How should I revise Transpiration for the ICSE Class 10 board exam?
Learn the core ideas first, then work through the 42 practice questions on Transpiration. 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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All ICSE Class 10 Biology Syllabus

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