Question

Hormone which helps in metamorphosis in insects in:
A. Pheromone
B. Thyroxine
C. Ecdysone
D. All of these

Answer 1

Hint:-Birth or hatching is called Metamorphosis. This process involves a conspicuous and
moderately rapid change in the construction of an animal’s body through cell growth and
differentiation. The process of metamorphosis is undergone by organisms like insects, fish,
amphibians, mollusks, crustaceans, cnidarians, echinoderms, and tunicates.

Complete step-by-step solution:-
We can say that the process of Metamorphosis is regulated by the ecdysone hormone which is a
prothoracicotropic hormone. The prothoracic gland and triggers molting are responsible to secrete
this hormone. This hormone activates tissue to promote the process of metamorphosis.
We can that the hormones of ecdysone and juvenile hormone are the one which controls the
process of growth and metamorphosis in insects is controlled by making some secretions of
prothoracic glands and corpora allata correspondingly. We can say that the growth and shedding of
The old cuticles of the larva are stimulated by the secretions of Ecdysone. Thus, a new cuticle is
formed beneath the old cuticle.
However, a chemical in animals produces which changes the behavior of another animal of the same the species is called Pheromone. While the hormone thyroxine helps in the metamorphosis in frogs.
So, the correct answer is option C.

Note:- In general, this process is often accompanied by a change of nutrition source or behavior in the organism. The animals are divided into types depending on their ability to undergo the level of
metamorphosis. Some species can undergo complete metamorphosis (this process is called holometabolous). Some organisms can undergo incomplete metamorphosis (this process is called hemimetabolous). Some organisms which do not undergo metamorphosis (this process is called ametaboly).