Who demonstrated the acrosome reaction in Saccoglossus
F.R. Lillie $(1919)$
Colwin and Colwin $(1967)$
$(a)$ and $(b)$ both
None of the above
It's Obvious
A hatching egg of chick is covered by plaster of paris. It is harmful for
The permeability of the human placenta to macro-molecules is evidenced by the presence of following in foetal blood
Brain originates from which germ layer
Which of the following enzyme helps sperm to penetrate zona pellucida?
Holoblastic cleavage may occur in eggs which are
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