After gastrulation the roof of archenteron is formed by
Neural plate
Mesoderm
Ectoderm
Chorda-mesoderm
It's Obvious
The layer of uterus which becomes much eroded due to placental villi is known as
Placenta is formed from
In the egg of bird, shell and shell membranes are
The narrow middle part of the epididymis is called
Chorion is found
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