Which of the following is not an element? O A. sodium chloride
O B. nitrogen
O C. hydrogen
O D. oxygen
O E. magnesium

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