A chemical formula contains information on the types and spatial arrangement of bonds in the chemical. It also tells you what elements are in the chemical, and how many atoms of each. The spatial arrangement is not necessarily very obvious from the formula, e.g. C2H5OH does not tell you much about the spatial arrangement of the bonds. A chemical formula contains information on the types and spatial arrangement of bonds in the chemical.
All modern amphibians are included in the subclass Lissamphibia, which is usually considered a clade, a group of species that have evolved from a common ancestor. The three modern orders are Anura (the frogs and toads), Caudata (or Urodela, the salamanders), and Gymnophiona (or Apoda, the caecilians).
Amphibian Adaptations. For amphibians, limbs and lungs were two of the most important adaptations as the former helped them move around without having to depend on the buoyancy of water, and latter replaced the gills to facilitate respiration.volution of Amphibians. Amphibians were the first vertebrates to adapt to the terrestrial life; something which occurred somewhere around 400-360 million years ago. The first major group of amphibians to evolve on the planet was armed with fins-which were quite similar to legs that helped them crawl out of the water.