NEET 2018, Biology Q68: Pregnancy and Embryonic Development
NEET2018Paper 2018Biology
Q.
The amnion of mammalian embryo is derived from
- A
ectoderm and mesoderm
- B
mesoderm and trophoblast
- C
endoderm and mesoderm
- D
ectoderm and endoderm
Solution
The extraembryonic or foetal membranes are amnion, chorion, allantois and Yolk sac.
Amnion is formed from mesoderm on outer side and ectoderm on inner side.
Chorion is formed from trophoectoderm and mesoderm whereas allantois and Yolk sac membrane have mesoderm on outerside and endoderm in inner side.
Concept behind this question
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