How do you know the molecule below is an unsaturated fat?

How does the nervous system affect the excretory system?

They live on every continent except antarctica

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?