Transpiration
ICSE · Class 10 · Biology
Summary of Transpiration for ICSE Class 10 Biology. Key concepts, important points, and chapter overview.
Overview
Transpiration is a vital physiological process in plants where water is lost as water vapour from aerial parts of the plant. Unlike simple evaporation, transpiration is a controlled biological process that plays crucial roles in plant survival, water transport, and temperature regulation. This proce
Key Concepts
Transpiration is the loss of water
Transpiration is the loss of water vapours from aerial parts of a plant (stem, leaves, buds, flowers) to the atmosphere. It is a physiological process
Three types
Three types: 1) Stomatal transpiration (80-90% of total) - through stomata on leaves, 2) Cuticular transpiration (3-9%) - through waxy cuticle layer,
Stomata are controlled by guard cells
Stomata are controlled by guard cells that contain chloroplasts. During day, photosynthesis produces glucose, increasing osmotic pressure. Guard cells
External factors
External factors: light, temperature, wind, humidity, soil water content, CO₂ concentration, atmospheric pressure. Internal factors: leaf arrangement,
Water moves upward from roots
Water moves upward from roots to leaves through xylem vessels due to three forces: transpiration pull (created by water loss), cohesive forces (hydrog
Learning Objectives
- Understand the definition and mechanism of transpiration
- Differentiate between evaporation, transpiration, and perspiration
- Learn about the three types of transpiration: stomatal, cuticular, and lenticular
- Understand the structure and functioning of stomata
- Analyze factors affecting transpiration rate
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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.
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