Which of the following drugs inhibits metamorphosis in frogs?

Fertilization is external in:

In which of the following animals are cleavage divisions restricted to a small part of the cytoplasm and nucleus in the animal pole of the egg?

Which of the following is a good example of metamorphosis?

During gastrulation,the dorsal lip of the blastopore (the first external sign of gastrulation) appears:

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