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

Fertilization is external in:

During embryonic development,the establishment of polarity such as anterior/posterior,dorsal/ventral,and medial/lateral axes is called:

In the development of a frog, the gastrulation process involves:

The yolk plug of a gastrula represents which part in the later stage of development?

Epiboly is the process of