Which of the following describes the embryonic period?
A) the period during which the blastocyst moves down to the uterus and begins to implant in the lining
B) the period during which the major organs and structures of the organism first develop
C) the period during which the zygote is formed
D) the period during which the skeletal, organ, and nervous systems become more developed and specialized

Question

Quizplus · Accepted Answer

The embryonic period is the period during which the major organs and structures of the organism first develop. This period typically lasts from the 2nd week to the 8th week after fertilization. Choices A and C describe the pre-embryonic period, while choice D describes the fetal period.

Which of the Following Describes the Embryonic Period