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
Blastodisc or germinal disc refers to the protoplasm of egg, this is restricted to small area in
The extra embryonic membranes of the mammalian embryo are derived from
Embryonic body form stage is characterised by
If the nuclei from an $8$-celled stage of an embryo are transplanted into enucleated eggs, which of the following events is likely to occur
The endodermel derivatives include
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