- Life Sciences
the spontaneous movement of molecules, atoms or ions, from an area of higher concentration to an area of lower concentration, of a particular molecule, atom or ion, until dynamic equilibrium is achieved.
the factor that changes in an investigation and is not under the control of the investigator....
minerals and vitamins that are taken as nutritional supplements to regular food (in the form of...
animals with three cellular body wall layers: the ectoderm, mesoderm and endoderm.