Q. In human beings
A) Chorion and amnion are well developed
B) Allantois and yolk sac are less developed
C) Yolk cell have very little yolk
D) All of the above
Explanation
The outer surface of the chorion in humans develops a number of finger-like projection called chorionic villi. Because the chorion takes part in the formation of placenta, the human placenta is chorionic placenta. Amount of yolk is very less and found in yolk sac of foetal membranes of humans
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.