Question

how did watson and crick first learn about the helical structure of dna? from rosalind franklins x - ray image by studying bacteriophages from linus paulings model from their own x - ray experiments

Explanation:

Rosalind Franklin's X - ray diffraction image, known as Photo 51, provided crucial evidence of the helical structure of DNA. Watson and Crick were able to view this image, which greatly influenced their model - building efforts.

Answer:

from Rosalind Franklin's x - ray image