Read this article about fertility clinics and unused human embryos. White a short paragraph summarizing the issue.
Why are unused embryos available? How could they be used in medical research?

What do nitrifying bacteria convert

How have high taxes on tobacco products impacted the number of people who use them? a. the number of tobacco users has increased. b. the number of tobacco users has decreased. c. the number of tobacco users has not changed. d. the number of adolescent tobacco users decreased, while the number of adult users increased

Which body region are part of the cephalic region?