The outer layer of the blastocyst which forms the ectoderm is called
Cnidoblast
Germinal vesicle
Trophoblast
Amnion
The cleavage is such method of divisions of fertilized egg in which the egg
Pregnancy begins with implantation of
Unfertilized egg of human contains or When released from ovary, human egg contains
$A$ : In morula stage the cells divide without any increase in size.
$R$ : Zona pellucida remains intact till cleavage is completed.