Tyranosaur was the biggest dianosaur

Egg laying mammals are placed in subclass

Which of the following disease is not associated with hypothyroidism

Deficiency of vassopressin hormone causes

Medullary sheath is synthesized by

During repolarization of nerve fibres, which ion gates are opened

which feathers of flying birds act as steering apparatus

Only gland present on the skin of Flying birds is

Which period is called age of amphibians

Skull of amphibians is

The hormone/s acting with a lag peroid