ROLE OF HORMONES IN COMPLETING THE LIFE HISTORY OF INSECTS AND FROGS
-
Hormones are required not only for human beings but are essential for life cycle of other organisms also.
-
Different organisms go through different stages of growth starting from the egg to the adult stage.
-
Example: Frogs go through three distinct stages, i.e., egg, tadpole (larva) and adult.
-
This transformation of the larva into an adult through sequential changes is called metamorphosis.
-
Metamorphosis in insects is controlled by insect hormones.
-
In a frog, it is controlled by thyroxine, the hormone produced by thyroid.
-
Thyroxine production requires the presence of iodine in water.
