1. The presence of teratogens during pregnancy creates the risk of problems in development. Your textbook identifies several principles that govern the relationship between teratogens and normal development. List and describe three of those principles.
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**Principle of Susceptibility**: This principle states that the susceptibility of a developing fetus to teratogens depends on the genetic makeup of the fetus and the timing of exposure. Different individuals may have varying levels of vulnerability to the same Show more…
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