The characteristic of a cell membrane that allows materials to pass through it is called
a. permeability
b. polarity
c. synthesis
d. catalysis

What is genetic variation? -(a) each individual in a population has slightly different genes. -(b) some individuals in a population have more genes than others. -(c) each population of a species has slightly different genes. -(d)some populations of a species have more genes than others.