How Did Vertebrates First Evolve Jaws? - Technology Networks

Nearly all fishes possess a tiny anatomical structure called a “pseudobranch,” which resembles a vestigial gill and according to research, this structure originates from the same mandibular arch that gives rise to the jaw.

Five-hundred million years ago, it was relatively safe to go back in the water. Thats because creatures of the deep had not yet evolved jaws. In a new pair of studies in eLife and Development, scient… [+3555 chars]

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