What best preserves the genetic code from one generation to the next

During the process of two rails or sides break apart and attract new nucleotide bases to form a new and complete strand.

Which of the following is caused by reproductive isolation within a species? a. a decrease in gene flow b. an increase in genetic flow c. a decrease in genetic drift d. an increase in gene flow

Where is most of the fresh water on earth found a in the ocean b in glaciers and in ice caps c in rivers d in the soil