Answer:
Only certain types of people can become dependent and addicted to a drug. True or False: Most studies show that people in the 18-25 year old age groups are by far the heaviest users and experimenters when it comes to drug use.
Each level of the food chain is a trophic level. hope this helps and i'm not too late!
Anthropologist (sorry if i’m wrong)!
Answer:
Vaccines have been around since 1796 preventing people from diseases and decreasing death rates. I believe due to the modern vaccines and medicine people have been living longer than life expectancies in the 1700's and 1800’s, which was between 30 and 40 years. Vaccines train the human body to recognize viruses or bacteria and the antigens (molecule capable of inducing an immune response) will start attacking the virus or bacteria before it tries to spread and cause sickness once it is has recognized it. However, vaccines are not always 100% safe because they can come with side effects. For example, the Hepatitis B vaccine had a severe allergic reaction, called anaphylaxis which caused difficulty breathing, dizziness, and skin rashes for a few people.
