From which embryonic structure develops the vertebral column
Neural canal
Archenteron
Notochord
Blastocoel
(c)In vertebrate vertebral column develops from embryonic notochord.
Massive amount of yolk present in the vegetal region of the egg, makes an egg
The seminiferous tubules of the testis opens into the vasa efferentia by
Placenta has an outer layer which is selectively permeable and hormone secreting which is known as
The placental barrier between the maternal and foetal blood is minimum in
After implantation, finger-like projections on the trophoblast are called $…A….$ which are surrounded by $…B..$ and maternal blood. Here $A$ and $B$ refers to
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