The hormone responsible for metamorphosis in tadpoles is .....

What is the regulatory effect of thyroid hormones on?

On an educational trip to Uttaranchal,Ketki and her friends observe that many local people have swollen necks. Please help Ketki and her friends to find out the solutions to the following questions.
$(a)$ Which probable disease are these people suffering from?
$(b)$ How is it caused?
$(c)$ What effect does this condition have on pregnancy?

............ support the process of red blood cells formation.

Which of the following diseases results from an endocrine disorder?

Cretinism is due to