The model shows a demonstration a student prepared using black and white marbles to show how populations of organisms can change. Which of the following concepts is best illustrated by this demonstration? Original population Equal frequency of black and white alleles Allele frequency differs New population increas New population increase Chance event reduces population size Chance event reduces population size a b Immunity from virulent microorganisms Evolution of a predatory species Environmentally induced genetic mutations Genetic drift accompanying natural selection Time left for this assessment:​