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Absorption, Transport And Water Loss In Plants

NIOS · Class 12 · Biology

Summary of Absorption, Transport And Water Loss In Plants for NIOS Class 12 Biology. Key concepts, important points, and chapter overview.

44 questions25 flashcards5 concepts

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A diagram illustrating the process of osmosis, where solvent molecules move across a semipermeable membrane from a region of higher solvent concentration (lower solute concentration) to a region of lo
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Overview

Water is the most essential component of living cells and is fundamental to plant survival and growth. This chapter explores how plants absorb water through their roots, transport it to various parts of the plant body, and lose it through transpiration. Understanding these processes helps explain ho

Key Concepts

Permeability is the property of

Permeability is the property of a membrane to allow substances to pass through it. Plant cell walls are fully permeable, allowing both solvent and sol

Diffusion is the spontaneous intermingling

Diffusion is the spontaneous intermingling of molecules of the same or different substances as a result of their random movement, from regions of high

Osmosis is a special type

Osmosis is a special type of diffusion where water molecules move from a region of higher water concentration (lower solute concentration) to a region

Solutions are classified based on their

Solutions are classified based on their solute concentration relative to cell sap: (1) Isotonic solutions have equal solute concentration as the cell,

Plasmolysis occurs when a cell

Plasmolysis occurs when a cell is placed in a hypertonic solution - water leaves the cell, causing the protoplasm to shrink and detach from the cell w

Learning Objectives

  • Define and differentiate between permeability, diffusion, osmosis, and plasmolysis
  • Distinguish between active and passive water absorption
  • Explain concepts of imbibition, water potential, turgor pressure, and wall pressure
  • Describe the pathways of water movement from root hair to leaf
  • Explain the mechanism of translocation of organic solutes in phloem

Frequently Asked Questions

What are the important topics in Absorption, Transport And Water Loss In Plants for NIOS Class 12 Biology?
Key topics in Absorption, Transport And Water Loss In Plants include Overview of Water Relations in Plants, Chapter Overview - Water Absorption, Transport and Loss in Plants, Classification of membrane types and their permeability properties in plant structures. These are the concepts NIOS Class 12 examiners draw on most — study them first, then practise related questions.
How to score full marks in Absorption, Transport And Water Loss In Plants — NIOS Class 12 Biology?
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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