Quote:
Originally Posted by Broadsword2004
Sure, but if said change is beneficial and continues to be beneficial for generation after generation, and develops more and more over generations, then you can see a large development of it over a long period of time.
Your example though is one of a massive evolutionary change very quickly, which doesn't happen. My point is that certain changes in life forms can occur where the change unto itself is not necessary for the creature's survival, but just something that can aid it better in surviving, and thus be passed on and over-time develop. For a half-leg-half-wing variation to develop would mean that the creature is capable of surviving that way plenty fine.
But a leg would not just start to turn into a wing where it becomes half-and-half via one variation. Such a change would take many generations. Thus for the leg to continue changing to a wing would mean that the creature is fully capable of surviving with this gradual adaption and that the change was continuing because the more the leg became a wing, the more beneficial it was to the creature for survival.
|
There is no fossil record of successive creatures going from a leg to a wing.
They have legs, or wings; not something going from one to the next.
Still not sure how any of the stages in between would render the creature more fit.