22) using x-ray crystallography, as well as other methods, the researchers watson and crick discovered the structure of dna.

The correct answer for the blank is-

Double helix structure of DNA.

M. Wilkins and R. Franklin obtained high-resolution images of DNA fibers with the help of X-ray crystallography, which suggested other scientists like Watson and Crick to discover a double helical structure of DNA ( deoxyribonucleic acid). In other words, using the information of the work done by these two scientist, Wastson and Crick discovered double helical structure of DNA.

it restores trees to areas where they once grew.

explanation:

yes you are doing it right great gob