The fact that exposure to a teratogen during the period of the zygote often leads to a spontaneous abortion (miscarriage) while the same exposure during the period of the fetus can lead to minor defects of bodily structures or systems demonstrates that
A) the impact of teratogens depends on the genotype of the organism
B) the impact of teratogens changes the course of prenatal development
C) different teratogens affect different aspects of prenatal development
D) the impact of a teratogen depends on the amount, or dose, of the teratogen

Question

The fact that exposure to a teratogen during the period of the zygote often leads to a spontaneous abortion (miscarriage) while the same exposure during the period of the fetus can lead to minor defects of bodily structures or systems demonstrates that
A) ​the impact of teratogens depends on the genotype of the organism
B) ​the impact of teratogens changes the course of prenatal development
C) ​different teratogens affect different aspects of prenatal development
D) ​the impact of a teratogen depends on the amount, or dose, of the teratogen

Quizplus · Accepted Answer

The fact that the impact of teratogens changes the course of prenatal development depending on when the exposure occurs, indicates that teratogens can alter the development trajectory of the fetus, leading to different outcomes in terms of potential defects or miscarriage.

The Fact That Exposure to a Teratogen During the Period