According to pathology,goiter is associated with which of the following?

Which of the following glands plays a key role in the metamorphosis of a frog's tadpole?

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?

Goiter is caused by the abnormal functioning of which gland?

Calcitonin lowers the calcium level in the blood. This is secreted by

Select the incorrect option.