O 1. Which criteria are used to classify amphibians into orders?

Biology

2 answers:

Oksana_A [137]3 years ago

7 0

Answer:

They are classified into three orders: frogs and toads, salamanders and newts, and caecilians.

Harlamova29_29 [7]3 years ago

7 0

Approximately 8,100 species of living amphibians are known. First appearing about 340 million years ago during the Middle Mississippian Epoch, they were one of the earliest groups to diverge from ancestral fish-tetrapod stock during the evolution of animals from strictly aquatic forms to terrestrial types. Today amphibians are represented by frogs and toads (order Anura), newts and salamanders (order Caudata), and caecilians (order Gymnophiona). These three orders of living amphibians are thought to derive from a single radiation of ancient amphibians, and although strikingly different in body form, they are probably the closest relatives to one another.

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