Angie50215 Angie50215
  • 21-05-2016
  • Biology
contestada

Why are such different animals as fish, amphibians, reptiles, birds, and mammals grouped into a single phylum?

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Аноним Аноним
  • 21-05-2016
The simplest answer is that these all have a backbone/notochord and all have internal skeletons of some type,
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