Metamorphosis of insects is regulated through hormone (a) pheromone (b) thyroxine (c) ecdysone (d) all of these.
Option C Ecdysone is a steroid hormone, secreted by a pair of prothoracic glands in the thorax of insects and by Yorgans in crustaceans, that stimulates moulting and metamorphosis. In insects its release is stimulated by prothoracicotropic hormone.
