What is the greatest harm to the growth of a fetus whose mother smokes?
a. High amounts of carbon monoxide pass to the fetus through the placenta.
b. The absorption of oxygen by the fetus increases to dangerous levels.
c. Nicotine builds up in the placenta and blocks the passage of nutrients.
d. The gases contained in cigarette smoke contaminate the amniotic fluid.
Question 2
Excessive consumption by pregnant women of which of the following is most harmful to a fetus?
a. cocaine c. marijuana
b. cigarettes d. alcohol
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Carbon dioxide (~390ppm)