Identify the human developmental stage shown below as well as the related right place ofits occurrence in a normal pregnant woman, and select the right option for the two, together.
Late morula $\to$ Middle part of Fallopian tube
Blastula $\to$ End part of Fallopian tube
Blastocyst $\to$ Uterine wall
$8$-celled morula $\to$ Starting point of Fallopian tube
$A$ : In morula stage the cells divide without any increase in size.
$R$ : Zona pellucida remains intact till cleavage is completed.
Egg undergoes cleavage and forms
On fertilization of egg nucleus with sperm nucleus
Syngamy is the process in which
Fertilization restores