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Transpiration

ICSE · Class 10 · Biology

Quick revision notes for Transpiration — ICSE Class 10 Biology. Key concepts, formulas, and definitions for last-minute revision.

44 questions22 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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Key Topics to Revise

1

Definition and Basic Concept

  • Transpiration is the loss of water vapours from aerial parts of a plant (leaves, stems, buds, flowers)
  • It is a physiological process carried out by living cells
  • Plants absorb huge quantities of water but retain only a small part for vital activities
2

Types of Transpiration

  • Three main types based on the structure through which water is lost
  • Stomatal transpiration accounts for 80-90% of total water loss
  • Cuticular transpiration varies from 3-9% among different plants
3

Stomatal Mechanism

  • Each stoma is surrounded by two kidney-shaped guard cells
  • Guard cells contain chloroplasts and can perform photosynthesis
  • Inner wall of guard cells is thick, outer wall is thin
4

Factors Affecting Transpiration

  • External factors: light, temperature, wind, humidity, water content of soil, CO₂ concentration, atmospheric pressure
  • Internal factors: leaf arrangement, cuticle thickness, number of stomata, anatomical features, root-shoot ratio
  • Light increases transpiration by opening stomata

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Full Notes

Key Concepts

Transpiration is the loss of waterThree typesStomata are controlled by guard cellsExternal factorsWater moves upward from roots

Frequently Asked Questions

What are the important topics in Transpiration for ICSE Class 10 Biology?
Transpiration covers several key topics that are frequently asked in ICSE Class 10 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Transpiration — ICSE Class 10 Biology?
Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision 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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