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Question 1

teratogens

Answer 1

agents, such as chemicals and viruses, that can reach the embryo or fetus during prenatal development and cause harm.

Question 2

fetal alcohol syndrome

Answer 2

• Persistent heavy drinking puts the fetus at risk for congenital (present at birth) disabilities, future behavior problems, and lower intelligence.
• marked by lifelong physical and mental abnormalities. The fetal damage may occur because alcohol has an epigenetic effect: It leaves chemical marks on DNA that switch genes abnormally on or off.