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RE: Species & Giraffe necks
Betty Cunningham wrote:
>As I understand it (from my Comparitive Anatomy professor MANY
>ago) the skulls of lions bred in captivity differs STRONGLY from
>wild counterparts-primarily due to unexercised muscle formation of
>jaws. They don't get the work out the wild ones do so the face is
>as heavily developed while growing up, which effects bone growth.
>No one ever told me if the same were true of tigers...
Which illustrates another point about vertebrate anatomy and
the feedback loop works both ways. Exercise of some behaviors during
development can leave marks that could be mistaken for genetic
in a limited fossil population.