Which of the following is a general principle outlining the action of teratogens?
A) The effect of a teratogen may be unique.
B) A teratogen will cause structural defects regardless of the point in time at which a fetus is exposed.
C) Teratogens always gain access to the fetus via the placental membrane.
D) The effects of teratogens on the genetic makeup of a developing embryo are similar across species.
Correct Answer:
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