When more than one sperm establish contact and penetrate into the egg, then it is called
Monospermy
Polyspermy
$(a)$ and $(b)$ both
None of these
Testes in rabbit are
The embryo of man is protected by
Blastula lacks
Neural crest cells break off from the ________ and later move to the sides of the developing embryo to form ________
Amniotic fluid protects the foetus from