In mammals the chorion and the allantois together form
Placenta
Endometrium
Uterus
Yolk sac
(a)In eutherian mammals chorion and allantois together form placenta.
Cells of leydig are found in
Germinal epithelium gives rise to
Cleavage was first observed by
The origin of kidney and ureter in Rana tigrina is
Vegetal hemisphere of egg consists of
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