Exposure to toxins is particularly dangerous to the embryo in the first trimester of pregnancy because
A) induction of organ systems is occurring during this period.
B) rapid cell division is taking place during this period.
C) tissue differentiation is occurring at its highest levels during this period.
D) organs are beginning to form during this period.
E) All of the above

Question

Quizplus · Accepted Answer

During the first trimester of pregnancy, all of the events listed in the answer options are occurring, making the embryo particularly vulnerable to exposure to toxins. Induction of organ systems, rapid cell division, tissue differentiation, and organ formation are all crucial processes that can be disrupted by exposure to harmful substances.

Exposure to Toxins Is Particularly Dangerous to the Embryo in the First