Question

During prenatal development, a particular organ or body part is most vulnerable to exposure to teratogens during the: a) critical period. b) vulnerability period. c) period of viability. d) period of the fetus.

Answer 1

a) Critical period.

Step-by-step explanation:

During the critical period, exposure to teratogens such as alcohol, medications, X rays, etc can affect an organ or body parts that are developing at a certain time during pregnancy. As the organs and body parts develop at different times of the pregnancy, there are different critical periods. Once that part of the body is developed, the risk of being affected by a teratogen is very low.