Question

james watson and francis cricks discovery would not have been possible without contributions by which scientist?
all of these
rosalind franklin
friedrich miescher
oswald avery

Explanation:

• Rosalind Franklin: Her X - ray diffraction images of DNA (like Photo 51) were crucial for Watson and Crick to determine the double - helix structure of DNA.
• Friedrich Miescher: He discovered nucleic acids (the material from which DNA is made), laying the foundation for understanding genetic material.
• Oswald Avery: His work showed that DNA, not protein, is the genetic material, which was an important step in the understanding of DNA's role before Watson and Crick's discovery of the structure.

Answer:

A. All of these