Match the researchers with the discoveries listed. took x‑ray diffraction pictures used in constructing the structure of dna determined that dna contains nitrogenous bases identified dna as the genetic material in bacteriophage discovered regularity in the ratios of different bases in dna determined that dna is responsible for transformation in bacteria worked out the helical structure of dna by building models discovered that dna consists of repeating nucleotides determined that dna is acidic and high in phosphorous conducted experiments showing that rna can serve as the genetic material in some viruses demonstrated that heat‑killed material from bacteria could genetically transform live bacteria