Absorption of Water and Minerals by Roots — Chapter Summary
ICSE · Class 10 · Biology
Summary of Absorption of Water and Minerals by Roots for ICSE Class 10 Biology. Part of the ICSE Class 10 Biology syllabus.
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Water is a major part of plant protoplasm, and plants generally contain more water than animals. It supports life processes such as photosynthesis, movement of substances, transpiration, and maintenance of shape in plant cells. Mineral elements are also essential for normal plant growth and are abso
Key Concepts
Water forms a large part
Water forms a large part of protoplasm and is necessary for many plant activities. It acts as a solvent, takes part in metabolic reactions, helps gas
Mineral elements are absorbed from
Mineral elements are absorbed from the soil as salts or free ions. Minerals such as nitrogen, phosphorus, potassium, calcium, iron, copper, magnesium,
Imbibition is the adsorption of water
Imbibition is the adsorption of water molecules by dry hydrophilic colloids due to surface attraction. It occurs along the diffusion gradient. Maximum
Diffusion is the movement of molecules
Diffusion is the movement of molecules of a substance from a region of higher concentration to a region of lower concentration when in direct contact.
Osmosis is a special kind
Osmosis is a special kind of diffusion in which water molecules move through a semipermeable membrane from a region of higher concentration to a regio
Learning Objectives
- To understand why water is essential for plants
- To explain how plants absorb water and mineral salts from the soil
- To distinguish between imbibition, diffusion, osmosis, endosmosis, and exosmosis
- To understand tonicity and its effect on plant cells
- To explain turgor pressure, wall pressure, plasmolysis, and deplasmolysis
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