Opossum Ears (IMAGE)

Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign

Opossum Ears

Caption

When mammalian middle ear bones develop, they begin as part of the arch of cartilage that makes up the embryonic jaw. In reptiles, these structures remain connected to the jaw as developmental processes gradually convert the cartilage to bone.

Credit

A.I. Neander, University of Chicago

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Credit A.I. Neander, University of Chicago

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