These sources of information are used to determine the relationships among different species. Which provides information at the species level? A.
comparison of fossil records
B.
comparison of the nucleotide sequences in DNA
C.
comparison of the morphology of the different species

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?

Development of new species as a result of the geographic separation of population called ?

Restriction enzymes are used in making recombinant dna. describe the role restriction enzymes perform when constructing recombinant dna. (60 points to the person who answers)