... bacteria, providing conclusive evidence that the phage genetic material consisted of DNA, not protein (Figure 2). In 1952, Rosalind Franklin photographed crystals of highly purified DNA showing a twisted helix. The bases, perpendicular to the length of fiber, have sugar-phosphate molecules on the outside of the helix. Further analysis showed one turn of the helix contains ten nucleotides and the diameter of ... ...

• Word Count: 2575
• Approx Pages: 10
• Has Bibliography
• Grade Level: Undergraduate

... evolve at a much higher rate than the beings that gave it birth. The transformation time from tree-shrew, to ape, to human far exceeds the time from analytical engine, to calculator, to computer. But science, in the past, has always remained distant. It has allowed for advances in production, transportation, and even entertainment, but never in history will science be able ... ...

• Word Count: 3104
• Approx Pages: 12
• Has Bibliography
• Grade Level: High School