High incidence of goitre is seen in the mountaineous region because of
Deficiency of iodine in water
Deficiency of iodine in food
Presence of antagonistic agents
$(a)$ and $(b)$ both
Pancreas acts as
Which part of the ovary in mammals acts as an endocrine gland after ovulation
Pheromones'' in insects are secreted from
The mineral element essential for the formation of insulin is
Toxic agent present in food which interferes with thyroxine synthesis, leads to the development of