Nasal cavities are separated from mouth by the developing palate * True O False The cartilage of the hyoid bone develops from the mesoderm of both the 2nd and 3rd pharyngeal arches * O True False The external auditory (acoustic) canal is derived from the 2nd pharyngeal cleft * True False The para-follicular c-cells of thyroid gland develops from the frontonasal process True False Each pharyngeal arch is composed of a central core of mesoderm, which is covered externally by endoderm and internally by ectoderm * True False

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