The growth rate of the frog’s population is the same in ponds near the coast or in the garden at home. Tadpoles develop from fertilized gelatinous eggs. These are larvae of frogs, which have gills and move forward with the help of a tail. Gradually, they go through a transformation to become a frog. The process is called metamorphosis. The tadpoles develop front and back legs, cartilages become bones, the tail retracts, lungs develop, and the gills regress. Now, it can move on land as well as water. Such a metamorphosis takes place in other animals too, for instance in butterflies or beetles.