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Diffusion is the movement of molecules from an area of high concentration to an area of low concentration down a concentration gradient. Lots of essential processes rely on this movement such as the diffu...

Osmosis is the passive movement of water through a partially permeable membrane from a high concentration of water to a low concentration of water. An example of this is when water moves from soil into a ...

Polymerase chain reaction (PCR) is a technique used in molecular biology to amplify a single copy or a few copies of a segment of DNA across several orders of magnitude, ...