A pregnant woman has an ultrasound to assess the progress of the twins she is expecting. Her doctor says, From what I can see on the screen, Ms. Black, it looks as if you will have a boy and a girl. In what stage of development must the twins be?
a. gamete
b. zygote
c. embryo
d. fetus
Question 2
A pregnant woman regularly uses cocaine and heroin throughout her pregnancy. Chances are that her baby will:
a. Have Down syndrome
b. Have Tay-Sachs disease
c. Be born late and have an exceptionally large head
d. Be born prematurely and show unusual irritability
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