Another way that prototypes are classified is by the fidelity of the prototype, or the degree to which the prototype represents the appearance and interaction of the system.[ 4 ] A low-fidelity prototype is one that is quickly constructed to depict concepts, design alternatives, and screen layouts.
A solution is a homogeneous mixture of one or more solutes dissolved in a solvent. 1  solvent: the substance in which a solute dissolves to produce a homogeneous mixture. 2  solute: the substance that dissolves in a solvent to produce a homogeneous mixture.
A solution is a mixture of two or more substances. It has a solvent and a solute. Depending on the concentrations there are different kinds of solutions and their applications differ too. Isotonic solutions have the same salt concentration as the surrounding blood cells. So an isotonic solution will have no effect on the surrounding cells. The cells will not gain or lose water if place in isotonic solution.