1、Reference to the 1st exercise: Specific Purpose: To inform my audience about the genetically modified foods. Central Idea: GM foods are introduced in terms of the concept, production, and the safety. Main Points: I. In recent years, there are some genetically modified organisms. II. What does “genet
2、ically modified” mean and how were those foods created? III. Modern genetically modified foods differ in the speed and precision with which we make changes. Now instead of selectively breeding for traits, we can go directly to the DNA responsible, snip it out and transplant it into newly developing plants and animals. IV. People may be wondering whether this over manipulation is safe.
