Which of these could be a reason why teens are more easily addicted to tobacco than adults? teens naturally have higher amounts of dopamine than adults. acetaldehyde in tobacco smoke greatly increases the rewarding properties of nicotine in adolescent test animals. adolescent test animals are more likely to become addicted to tobacco due to a more stressful living environment. teens naturally have lower amounts of monamine oxidase.

Explain why methicillin resistant staphlococcus aureus (mrsa) is more prevalent now than it was only 30 years ago. a. antibiotics cause mutations in staphlococcus aureus that lead to an increase in the number of methicillin-resistant strains. b. methicillin resistance causes an infection to spread more rapidly.c. frequent and inappropriate use of methicillin-type antibiotics has provided selective pressure that has resulted in an increase in the proportion of methicillin-resistant strains of staphlococcus aureus.d. diseases like aids have made people more vulnerable to infections from staphlococcus aureus.