भ्रूणीय विकास की वह प्रक्रिया जिसमें तीन जनन स्तरों (germ layers) का निर्माण होता है, कहलाती है:

On the basis of the amount and distribution of yolk, a frog's egg is classified as:

If the thyroid gland is completely removed from a frog tadpole, it will:

What major biological change occurs during the pupal stage inside a chrysalis?