quarta-feira, 4 de novembro de 2009


Amphibians-

* This class of vertebrate animals consists of frogs, toads, salamanders and caecilians water, it was the first to appear on planet Earth around 300 million years.
* There are still rare and ancient species that lived in the Coal Age, a period in which these animals were the dominant group.
* The word amphibian comes from the Greek and its meaning "two lives". An example is the frog that was born as tadpoles, surviving only in the water, but, as an adult, it loses its tail and becomes a Anura, order of frogs, toads and frogs. This term is quite old and refers to the main frogs, toads and frogs (hence the name).
* About 4000 species belong to the group of modern vertebrates, and its three main categories: the Caudata, Anura, or Gmnofiona apoda, are those that have the form of worm.
* Amphibians have the ability to live both inside and outside the water, however, your skin needs to be constantly moist, it functions as a means of breathing for this animal.

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