A tadpole turns into a frog after undergoing a series of changes. When it hatches from the egg, in no way does it resemble a frog. It has a small black body, a tail and a pair of gills. For some days, it has no mouth and it attaches itself to a stone or a leaf and survives on the remain of the egg-yolk.
Soon it develops a mouth with horny teeth and starts feeding on vegetation. Gradually, the internal gills develop, the hind and the front legs appear and the tail disappears. The mouth becomes bigger and soon the tadpole changes into a frog.
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