what is assimilation gcse
474 pages on this wiki. Assimilation is where an organism uses molecules which have been absorbed from external substances (e.g. food) and makes them part of the organism.xamples of assimilation include the absorption of nutrients into the body after digestion in the intestine, and their transformation into other molecules; and photosynethesis. This article is a stub, and is very fishy. You can help GCSE Wiki by expanding it, removing the non-GCSE content or improving it.