The life cycle of a frog is comprised of three stages, namely the egg, tadpole (larva) and the adult frog. In its life cycle, the frog shows drastic changes in the physical appearance of each stage. That is, the tadpole undergoes drastic changes to transform into an adult frog, in terms of body parts. This change is termed as metamorphosis.

•The first stage of life cycle of a frog is the egg. Eggs of a frog are present as a cluster and are slimy in nature. They hatch in around 3-25 days, depending on species and temperature of water. The hatched egg proceed to next stage, the tadpole.

•The second stage is the tadpole. These are long, slender organisms, which metamorphose into an adult frog, over weeks. It has an ill-defined head-body and tail, as body parts.

•The last stage is of the adult frog, which is the transformed tadpole. It has no tail, but limbs, and a properly differentiated body and head.