What is diffusion?
Diffusion is the process by which a molecule moves from an area of high concentration to an area of low concentration, down a concentration gradient. Any gas or liquid can move by diffusion, and no energy is required.
JF
Related Biology GCSE answers
All answers ▸A walker falls through thin ice into very cold water. What does the body do to stop the core body temperature from falling too quickly?
What is osmosis?
Name two components of an animal cell, and briefly describe their role.
Why does cholesterol need to be reduced and how do statins do this?