1. What is the best title of this passage?
1. Roots of Obesity 2. The Fat Virus
3. Dramatic Weight Gain 4. Obesity in People
2. What is NOT mentioned as a cause of obesity?
1. Genes 2. A virus
3. A vaccine 4. Lifestyle
3. Which of the following is TRUE?
1. Some animals are fat because of a virus. 2. AD-36 does not cause monkeys to gain weight.
3. It is acceptable to inject people with a virus. 4. Scientists know how widespread AD-36 is.