The infrence that earth has an outer core and inner core is based on studies of? a) Earthquake wave data
b) glacier core samples
c) recent fossil discoveries
d) celestial observations​

All eukaryotic cells contain small bodies called

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?

Which of the following best explains the changes in biodiversity shown in the graph?