Which of the following statements is true of teratogens?
A)They exclude substances ingested by mother, such as nicotine or alcohol.
B)The effects of chemical teratogens depend on the timing of exposure.
C)They refer to the birth defect caused by radiation.
D)The development of a fetus is typically enhanced by teratogens.

Question

Quizplus · Accepted Answer

Teratogens are substances or environmental factors that can cause birth defects or developmental abnormalities in a fetus. The effects of chemical teratogens depend on the timing of exposure, which can affect different stages of fetal development. Substances ingested by mother like nicotine or alcohol are examples of teratogens. Radiation can also be a teratogen, but it refers to the harmful effects of exposure to ionizing radiation on the developing organism. Therefore, statement (B) is the only one that is true. Statement (D) is incorrect, as teratogens generally have a negative impact on fetal development.

Which of the Following Statements Is True of Teratogens