The development of a frog is:

If the size of a fertilized egg of a frog is compared with the size of its blastula and gastrula stages,which of the following observations will be correct?

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:

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

Which one of the following statements is correct?

Which one of the following parts serves the function of primary organizer in the frog embryo?