in a bird egg embryo gets nourishment through
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in bird egg embryo gets nourishmrnt through egg yolk
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in a bird's egg embroy gets nourishment from yolk present inside the egg .well in mammals the embro is attached to the mother's body by an umbilical cord.nutrition from the mother's body is transferred to the embryo via the umbilical cord .in case of bird and reptiles, they lay eggs
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