The army cutworm moth is a critical source of fat for many of yellowstone national park's grizzly bears; they overturnrocks to find them and consuming as many as 40,000 apiece in a single day.

Select the word from the list that best fits the definition process that takes place at mid-ocean ridges sea floor spreading continental drift magnetic reversal magnetic minerals fossils

Select all that apply genes are specific nucleotide sequences occur in numbers that are the same as the number of chromosomes are located in a specific place on a chromosome determine the traits of an organism are units of rna

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?