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What are tetrapods and their evolution? Introduction: Tetrapods are members of the super-class of Tetrapoda. This class…

What are Lob-Finned Fishes? Introduction:  Lob-finned fishes are also called sarcopterygian, derived from the Ancient …

What are Ray-Finned-Fishes? Introduction: Ray-finned fishes are the biggest class of fishes, also called Actinopteryg…

What are Chondrichthyes? Introduction:  The Chondrichthyes are a class of fishes having well-defined jaws and a skeleto…

What is Origin of bones and teeth in vertebrates? Origin of bones Introduction: Scientists study all the fossil remai…