Biology · Animal Embryology
The definitive placenta in most eutherian mammals is primarily formed from which fetal membranes?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Amnion
- 2Chorion only
- 3Chorion and Allantois✓
- 4Yolk sac
Correct answer
Chorion and Allantois
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