True or false: a specific antibody can fight off any antigen

Which of these cities would be found in the most densely populated area on northern section of the map? a) beijing b) seoul c) shanghai d) tokyo

Alcohol is involved in about of all fatal highway accidents.

How has the money from oil production in the middle east not impacted the people of that region? a) it improved education and jobs in the region. b) it improved infrastructure such as ports, roads, and bridges. c) it increased life expectancy due to improved healthcare facilities. d) it increased political stability and lessened the presence of corruption.