Three processes that occur in cells are described below.
- Substances pass through the lipid bilayer of a cell from areas of high concentration to areas of low concentration.
- Substances move through protein channels of the lipid bilayer of a cell from areas of high concentration to areas of low concentration.
- Substances move through the lipid bilayer of a cell from areas of low concentration to areas of high concentration.
These processes are all examples of ---
A.) crossing over
B.) the migration of genetic material
C.) selective permeability
D.) cellular energy use