Neural canal develops from
Ectoderm
Mesoderm
Endoderm
All the above
Implantation or uterine attachment of the blastocyst presumably occurs between
The function of amniotic cavity is
Phallic organs in cockroach are related to
Given below is a diagrammatic sketch of a portion of human male reproductive system. Select the correct set of the names of the parts labelled $A, B, C, D.$
Blastopore is found in