Friday, 5 January 2018

What is osmosis?

Answer : Osmosis is the passage of water from a region of high water concentration through a semi-permeable membrane to a region of low water concentration. Through osmosis, the plasma membrane allows or permits the entry and exit of some materials in and out of the cell. It also prevents movement of some other materials. Unicellular freshwater organisms and most plant cells tend to gain water through osmosis. Absorption of water by plant roots is also an example of osmosis.
Osmosis is of great importance in biological processes where the solvent is water. The transport of water and other molecules across biological membranes is essential to many processes in living organisms. The energy which drives the process is usually discussed in terms of osmotic pressure

This is an answered question from Chapter 5 . THE FUNDAMENTAL UNIT OF LIFE of CBSE Class 9th Science

Check for Complete Exercise Solution for Chapter 5. THE FUNDAMENTAL UNIT OF LIFE | CBSE Class 9th Science

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