What is a substance into a tobacco smoke that reduces the bloods ability to carry oxygen.

Energy needs, in total kilocalories per day, are greater during than any other time of life. a.childhood b.infancy c.adulthood d.adolescence

How does drinking alcohol or using drugs put a person at risk for hiv infection? a.they improve judgment, which makes it more likely for people to engage in risky behavior. b.they impair judgment, which makes it more likely for people to engage in risky behavior. c.they impair judgment, which makes it less likely for people to engage in risky behavior. d.they improve judgment, which makes it less likely for people to engage in risky behavior.

Which sti is a common cause of cancer?