The earliest shark-like teeth we have come from an Early Devonian (410-million ... the oldest-known group of modern sharks, the Hexanchiformes or sixgill sharks, had evolved. They were followed during ...
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Science quiz of the month: February 2018Question] [Answer-Correct]Atlantic sixgill shark[/Answer-Correct] [Answer]Atlantic ... in length and has unique, saw-like lower teeth and six gill slits.[/Trivia] [Question]What is the name ...
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