The frog is a/an . . . . . . .

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

The enzyme secreted from the acrosome of a frog's sperm is:

The blastopore is the opening of which structure?

The development of the eye in vertebrate embryology is studied under which of the following processes?

In frog,equal holoblastic cleavage is not found due to: