Red blood cells, white blood cells, smooth muscle cells, sperm, skin cells, etc... all have particular structures that help them do their jobs. What is it called once these cells have their specific jobs?

Agene pool: a) is the collection of all the alleles found in a single species b) is the collection of all the alleles found in a single population c) is the collection of all the chromosomes found in a single population d) is the collection of genes in a species that allow the individuals to swim