Which of the following is a possible mechanism by which maternal smoking can influence the baby’s health?
a. Maternal smoking opens blood vessels throughout the body, flooding the placenta.
b. Maternal smoking increases methylation across a wide swath of the genome.
c. Maternal smoking disrupts several aspects of early brain development and leads to loss of neurons later in the pregnancy.
d. Maternal smoking raises carbon monoxide and lowers oxygen levels in the fetus’s bloodstream.
Answer: D
Psychology
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