The transformation of silkworms and frog larvae into adults through drastic changes is called __________.

The correct answer is metamorphosis.

Key Points

• Metamorphosis process: The transformation of the larva into an adult through drastic changes is called metamorphosis. It is a biological process that involves sudden and abrupt changes in the body structure of the animal by cell growth and differentiation. It is generally observed in amphibians and insects. Examples: frogs and butterflies.

Important Points

• Metamorphosis of a butterfly
  • There are four stages in the process of the Metamorphosis of a butterfly.
  • The first stage is the egg.
  • The Butterfly eggs are laid on the plants by the female Butterfly.
  • The second stage is the larva stage in which the butterfly exists in the form of a caterpillar.
  • The Third stage is Pupa which is the transitional phase in which the Caterpillar changes into Butterfly.
  • The fourth stage is the Adult stage in which a full-grown adult butterfly comes out of the pupa.

Additional Information

• Complete metamorphosis is seen in butterflies. 
• Complete metamorphosis consists of a very active, ravenously eating larval stage and an inactive pupa stage while the incomplete metamorphosis has a nymph, which very closely resembles the adult
• Examples of insects showing Complete metamorphosis -  wasps, ants, butterflies, and fleas  
• Examples of insects showing Incomplete metamorphosis - are termites, praying mantis, and cockroaches