Question 1
As regards the immune system, older people are more likely to develop
◦ common colds.
◦ warts.
◦ stronger immune responses.
◦ an increased risk of AIDS.
◦ autoimmune diseases.
Question 2
At about how many weeks of pregnancy is a chorionic villus sampling performed?
◦ eight
◦ ten
◦ fourteen
◦ sixteen
◦ twenty