During the period of the zygote, the __________ becomes the new organism, and the __________ becomes the structures that provide protective covering and nourishment.
A) embryonic disk; trophoblast
B) trophoblast; amnion
C) yolk sac; chorion
D) embryonic disc; villi

Question

Quizplus · Accepted Answer

During the period of the zygote, the embryonic disk becomes the new organism, and the trophoblast becomes the structures that provide protective covering and nourishment. The amnion and chorion are part of the extraembryonic membranes that develop later. The yolk sac is also an extraembryonic membrane but is not involved in providing nutrients in humans. Villi are finger-like projections that develop on the chorion and help facilitate nutrient and gas exchange between the embryo and the mother, but they are not present during the period of the zygote.

During the Period of the Zygote, the __________ Becomes the New