Umbilical cord in mammals, contains
Placenta
Umbilicus
Allantoic artery and vein
Discus poligerous
It's Obvious
Sertoli cells are found in
Internal ear develops from
The chemical substance found in the surface layer of cytoplasm of spermatozoa is
Name $A, B, C$ chormones in the given figure
Gyanogamones are secretions from
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