Cohen had found a way to cross species boundaries, using cells of DNA called plasmids, and had also came up with a way of isolating and cloning genes. ... The oldest of these techniques is called Recombinant DNA. ... They will determine this using a method called risk assessment. ... Scientists are unable to predict if a particular protein will be a food allergen in any other way than simply through "trial and error" or, as they call it, experience. ...

• Word Count: 3150
• Approx Pages: 13

As for eukaryotic cells, according to Lynn Margulis's hypothesis, they arose from what is called a symbiont relationship. ... Darwin observed that wild animals and plants showed variations just as domesticated animals and plants did. ...

• Word Count: 2685
• Approx Pages: 11
• Grade Level: High School