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).
When you are done with this section, take the Amphibians Quiz. Amphibians are one of the classes of chordates. The word amphibian means both sides of life. This is because the amphibian begins its life in the water and then finishes it mainly on land.The change of an animal in its appearance from baby to adult is called metamorphosis.An amphibian goes through metamorphosis as it grows from a baby to an adult.The amphibian, because it must be moist, sometimes hides out in the summer as if hibernating. This is called estivation.he change of an animal in its appearance from baby to adult is called metamorphosis. An amphibian goes through metamorphosis as it grows from a baby to an adult. The amphibian, because it must be moist, sometimes hides out in the summer as if hibernating. This is called estivation.