Answer:
Evolution is change in the heritable characteristics of biological populations over successive generations.
Explanation:
An example of evolution is the theory started by Charles Darwin that theorizes about how humans came to be in their present form.
One strand of DNA contains many proteins.
Facilitated diffusion of substances crossing the cell (plasma) membrane takes place with the help of proteins such as channel proteins and carrier proteins.
By definition: Facilitated diffusion<span> is the process of spontaneous passive transport of molecules or ions across a cell's membrane via specific transmembrane integral proteins.~Google
An example, the only I can really think of:
Polar and large molecules normally can't cross the lipid bi layer using simple diffusion, it usually has to be </span>Facilitated diffusion
