Teratogens may be harmful to one species but not another.

Question

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Teratogens are substances that can cause birth defects or developmental abnormalities in embryos or fetuses. The effect of teratogens can vary depending on the species, as different species may have different susceptibilities to these substances. For example, alcohol is a teratogen that can cause fetal alcohol syndrome in humans, but it does not have the same effect on other animal species. Similarly, certain drugs or chemicals may affect some species more severely than others.

Teratogens May Be Harmful to One Species but Not Another