The major effect of genetic drift is:
A) The reduction in genetic variability
B) An increase in genetic variation to accommodate changes in abiotic conditions
C) no change in population size but an increase in favorable alleles
D) a reduction in population size and an increase in genetic variability

American scientist, linus pauling, was one of many scientists racing to discover the molecular structure of dna. pauling initially thought that the molecule was a triple helix. later, james watson and francis crick unveiled their double helix model, which turned out to be an accurate description of the molecule's shape. why did watson and crick succeed when pauling failed?