Which of the following two extra embryonic membranes have the similar origin of their internal and external layers? (1)Chorion and allantois(2)Amnion and chorion (3)Allantois and yolk sac(4)Chorion and yolk sac
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Answer:
2 amnion and chorion
Explanation:
these are the extra embryonic layer formed by the process of gastrulation
amnion - parietal extra embryonic mesoderm
chorion - viseral extra embryonic mesoderm
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