Beginning of Essay
Frog is the common name for a species of amphibian that also includes toads. A very common question is “whats the difference between and toads?” , the answer: none, except for the fact that toads lack the powerful legs that have. “Where can and toads be ....

Middle of Essay
.... gills and tail disappear, and they develop lungs and legs. This period of tadpole life can be divided into three stages. The first stage, called “ premetamorphosis,” lasts about 50 days (Patent 54). The second stage, in which the hind legs grow, is called “prometamorphosis,” and lasts about 21 days. When the legs are about as long as the body, the third stage, which is called “ metamorphic climax,” and takes place very rapidly, begins. During this last stage, which lasts about a week, many great changes occur. They lungs complete their development, and the gills disappear. The skin gets thicker, nostrils form, and the tail is c ....