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Re: Warm-Blooded debate
In a message dated 97-06-24 11:50:48 EDT, Dinogeorge writes:
> I don't claim >merely on that basis< that a four-chambered heart is
necessary
> for an erect tetrapod stance. Just on that basis, I could equally well
assert
> that having an erect stance is necessary for both endothermy and having a
> four-chambered heart!
Well, no, not really, because there are animals out there today (monotremes
and a few types of eutherians) that are endothermic and have a four-chambered
heart but have only a "semi-improved" stance!
NP