Answers

2015-01-08T13:03:28+05:30
The superclass Tetrapoda ;-the tetrapods , comprises the first four-limbed vertebrates and their descendants, including the living and extinct amphibiansreptilesbirds, and mammals. The tetrapods evolved from the lobe-finned fishes about 395 million years ago in the Devonian Period. The specific aquatic ancestors of the tetrapods, and the process by which land colonization occurred, remain unclear, and are areas of active research and debate among palaeontologists at present.
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2015-01-08T17:45:07+05:30
The superclass Tetrapoda ;-the tetrapods , comprises the first four-limbed vertebrates and their descendants, including the living and extinct amphibians, reptiles, birds, and mammals. The tetrapods evolved from the lobe-finned fishes about 395 million years ago in the Devonian Period. The specific aquatic ancestors of the tetrapods, and the process by which land colonization occurred, remain unclear, and are areas of active research and debate among palaeontologists at present.
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