Question

All extra embryonic membranes

• A. Take part in the formation of embryo
• B. Does not take part in the embryo formation
• C. Form the placenta
• D. Perform the function of excretion of embryo

Answer 1

The correct option is B Does not take part in the embryo formation

The placenta is the most important extraembryonic structure for placental mammals. There are four different extraembryonic membranes as the chorion, the allantois, the yolk sac and the amnion. These membranes does not take part in embryo formation and perform some other functions.
Thus, the correct answer is option (B).