Which examples are indirect evidence used to study earth's interior? check all that apply.
composition of minerals in a rock
analysis of several seismographs
location of an earthquake's epicenter
identification of seismic wave direction
texture of different core rock samples

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?