Answer:
Watson and Crick were able to develop a more accurate molecular structure because they had access to x-ray crystallography! Pauling didn't actually failed, he just did't have the same means!
Explanation:
By the way, is now known that the real discovery of DNA molecule was made by Rosalind Franklin. Any doubts you can send me a message!
The anwser is a. look it up or sum idek it fr
Introduced species can harm our planet because in some regions of the world we are not prepared for their type of species, which can all in all cause damage.
