Populations change naturally over time. which mechanism is a method of artifical selection rather than natural selection?
a) genetic drift
b) natural selection
c) selective breeding
d) geographic isolation

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.

the three components of a nucleotide are the nitrogenous base, the phosphate group and the five-carbon sugar.