The rolling of endodermal and mesodermal cells from the surface of embryo into its interior is called
Ingression
Invagination
Involution
Inversion
The endodermel derivatives include
The function of amniotic cavity is
Which of the following is not the function of Sertoli cells (sustentacular cells)?
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 cleavage having incomplete division of egg is known as