The body of water disappears and the area becomes land.
The answer to finish this sentence would be ''the amount of genetic variation in a population'' because environmental factors can either increase or decrease a population.
Channel proteins are a type of transport protein or permease that provides a tube like opening in the plasma membrane through which particles can diffuse through. This is primarily one distinction between the 2 mechanisms or processes of simple diffusion. Facilitated diffusion and simple or passive diffusion. The use of these specific proteins.