The permeability of the human placenta to macro-molecules is evidenced by the presence of following in foetal blood
Globulin
Albumin
Anti $Rh$ factor
None of the above
A freshly unfertilized egg of hen contains
Which of the following structure originates from ectoderm
In both chordates and non-chordates intestine develops from
In which of the following animal cleavage divisions are restricted to a small part of cytoplasm & nucleus in animal pole of egg
Which cell organelle is absent in human sperm?