The fifth cleavage of the fertilized egg of a frog results in the formation of: (in $cells$)

In which of the following is $Bidder's$ canal present?

The yolk plug is a structure in the gastrula which is formed by the protrusion of:

When a small piece of the dorsal lip of the blastopore of a frog's early gastrula is transplanted into another gastrula of similar age at the ventral lip,the result is:

Based on the distribution of yolk, the egg of a frog is:

In some eggs,future organs can be demarcated even before cleavage begins. This type of development is called