NCERT Important Questions Class 9 Science biology Chapter 5
Important NCERT Extra Questions
Chapter 5 The Fundamental Unit of Life
NCERT Book Extra Questions for Session 2022-2023
CBSE Board and UP Board Others state Board
Define Diffusion.
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The process of movement of a substance (solid, liquid or gas) from the region of higher concentration to the region of lower concentration so as to spread uniformly is called diffusion.