Metamorphism - Lifecycle Of Frogs And Insects

We know hormones have a very influential role in human life. The sex hormones help to achieve sexual maturity in boys and girls. Hormones other than sex hormones perform other particular body functions. The variation in the level of different hormones in the blood leads to many disorders. Even though these disorders can be controlled, they are not completely curable. Like humans, other animals also have hormones in their blood. Let’s see how these hormones influence the life cycle of an organism like frogs and insects and causes metamorphism.

What is Metamorphism?

Metamorphosis is a biological process by which animals including insects, amphibians and few aquatic animals undergo extreme and rapid physical changes some time after the birth. The result of metamorphosis changes the entire body of an organism. These changes includes maturation of enzymes, blood cells, the remodeling of the nervous systems, digestive systems and so on.

Metamorphism and Hormones

Viviparous animals give birth to young ones while oviparous animals lay eggs, which eventually grow and become adults. The majority of animal’s offspring look similar to their adults by birth. But there are few organisms which appear to be different from their adults. In their lifecycle, they undergo many changes.

The life cycle of frogs and insects involve sequential stages of change. An adult silk moth starts its life from an egg. Eventually, it becomes a silkworm and later becomes a cocoon. At last stage, a moth develops from the cocoon. If we consider the life cycle of a frog, there are three stages. Eggs of a frog develop into a larva (tadpole) and later become an adult frog. These drastic changes in appearance and stages are not as lengthy as human growth. The changes in the stages from a larva to an adult are known as metamorphism.


Metamorphism in Frogs

Metamorphism is a hormonal effect. Metamorphism in frogs are controlled by the hormones called thyroxine and it is produced by the gland called thyroid. For the production of thyroxine, thyroid gland needs iodine. Frogs need to live in water bodies where sufficient iodine is present for thyroxine production. Hence, deficiency of iodine can retard the growth of a larva to become an adult frog. Metamorphism in insects is also a result of hormonal activity in them.

Stay tuned with BYJU’S to learn more in detail about metamorphism its types and stages.

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