Evolution is a tree of life. New species that branch off older species are part of those very branches. Of course they are still gulls; no evolutionist worth his salt would say that gulls did not descend from other gulls. The great apes who descended from a common ancestor may very well be separate species that cannot interbreed, but they are all still great apes.
Speciation is, as I said earlier, based upon adaptations to environmental conditions, as well as other conditions. The first organisms had to have travelled and found themselves and their descendants in different areas, which clearly gave rise to new species.
Such a creature would not be able to survive. As I said before, evolution is about adaptation to an organism's surroundings. It simply would not happen because it is maladaptive. Such a creature would actually run counter to the idea of natural selection.
Here is an article that elaborates this further: http://talkorigins.org/indexcc/CB/CB925.html, and this page is rather good, too. http://talkorigins.org/indexcc/CB/CB921_2.html
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Speciation is, as I said earlier, based upon adaptations to environmental conditions, as well as other conditions. The first organisms had to have travelled and found themselves and their descendants in different areas, which clearly gave rise to new species.
Such a creature would not be able to survive. As I said before, evolution is about adaptation to an organism's surroundings. It simply would not happen because it is maladaptive. Such a creature would actually run counter to the idea of natural selection.
Here is an article that elaborates this further: http://talkorigins.org/indexcc/CB/CB925.html, and this page is rather good, too. http://talkorigins.org/indexcc/CB/CB921_2.html