The mammalian primitive streak gives rise to
Ectoderm
Mesoderm
Endoderm
Germ layers
It's Obvious
$A$ : The morula passes through the phase of compaction, produces two major type of cells : the peripheral cells and the inner cell mass. $R$ : The descendants of inner cell mass become the trophoblast cells
Amniotic fluid protects the foetus from
Amniotic fluid is found in
A change in the amount of yolk and its distribution in the egg will affect
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