Read the article then answer the following questions. 3. Why is it difficult to create a vaccine for AIDS? a. the virus is too well hidden in the body b. the virus is constantly changing c. vaccines only work on bacterial infections d. not enough research money 4. Years ago, doctors would prescribe antibiotics for many symptoms of a common cold. Today, it is much more difficult to get a prescription. Why has the medical industry changed its procedures? a. too many antibiotics can create resistant bacteria b. pharmaceutical companies objected to the amount of prescriptions c. antibiotics can make people sick d. doctors are against prescribing medicines 5. To see evolution in action, you should look at organisms with: a. short lifespans b. complex body systems c. large populations d. short amount of time between generations

Read the article then answer the following questions. 3. Why is it difficult to create a vaccine for AIDS? a. the virus is too well hidden in the body b. the virus is constantly changing c. vaccines only work on bacterial infections d. not enough research money 4. Years ago, doctors would prescribe antibiotics for many symptoms of a common cold. Today, it is much more difficult to get a prescription. Why has the medical industry changed its procedures? a. too many antibiotics can create resistant bacteria b. pharmaceutical companies objected to the amount of prescriptions c. antibiotics can make people sick d. doctors are against prescribing medicines 5. To see evolution in action, you should look at organisms with: a. short lifespans b. complex body systems c. large populations d. short amount of time between generations