As a result of cleavage,if blastomeres are symmetrically placed around the polar axis,the type of cleavage is known as:

In the blastocyst,the blastomeres are arranged into an outer layer called _ $A$ _ and an inner group of cells attached to the trophoblast,called _ $B$ _.

Select the correct statement.

What happens during fertilization in humans after many sperms reach close to the ovum?

Site of fertilization in a mammal is ......

The fertilized egg divides by the process of