Of wrist-bones only two remain in the adult bird; the original distal carpals coalesce with the proximal end of the metacarpals. [Please select]
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There is only one row of carpals present (the proximal row of other tetrapods). [Please select]
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Neither of these alternatives seems at all likely to us in view of the well-ossified condition of the elements that are present, and the occurrence of both the proximal carpals and the metacarpals. [Please select]
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