The critical period is
A) the time during which a sperm can fertilize an oocyte.
B) the time during which an oocyte can be fertilized.
C) the time during which an embryo can implant in the uterine lining.
D) the time during development when structures are sensitive to damage from a mutation, toxin, or virus.
E) labor.

Question

Quizplus · Accepted Answer

The critical period refers to the time during development when structures are sensitive to damage from mutations, toxins or viruses. This period is also known as the sensitive period or vulnerable period. During this time, damage can lead to permanent and irreversible abnormalities. This period differs depending on the organ or structure being formed, and can occur during prenatal, postnatal, or adolescent development.

The Critical Period Is