A) trophoblast
B) follicle cells
C) inner cell mass
D) formative cell
Correct Answer: A
Solution :
Extra embryonic membranes or foetus membranes of mammalian embryo are formed from the trophoblast (the ring of cells surrounding the inner cell mass in a developing pre-embryo). These membranes called extra embryonic membranes because they are not a part of the body of the embryo. These membranes play some role in the life support of the pre-embryo, the embryo and the foetus.
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