Exposure to a teratogen is most dangerous to the embryo during the morula stage.

Question

Quizplus · Accepted Answer

Exposure to a teratogen is most dangerous to the embryo during the organogenesis stage, which occurs after the morula stage. During organogenesis, the major organs and structures of the body are formed and are particularly susceptible to damage from teratogens. The morula stage is when the embryo is still a compact ball of cells and has not yet begun to differentiate into specific cell types.

Exposure to a Teratogen Is Most Dangerous to the Embryo