Mesoderm gives rise to all the structures except
Nervous system
Muscular system
Circulatory system
Gonads
(a)Nervous system develops from ectodermal layer.
Human placenta is derived from
The rolling of endodermal and mesodermal cells from the surface of embryo into its interior is called
Which of the following enzyme helps sperm to penetrate zona pellucida?
Which mammals have more yolk than cytoplasm in their eggs
The yolk plug of gastrula represents in the later stage its
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