A) Amnion
B) Allantois
C) Chorion
D) Yolk sac
Correct Answer: B
Solution :
Allantois is an extra embryonic membrane developed as an outgrowth from hindgut. In the eggs of reptiles and birds, it functions as a urinary bladder and stores the waste excretory products. It also provides oxygen (in reptiles, birds and mammals) and food (in mammals) to the embryo.
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