Observed evolution of organs??

atomweaver said:

Italian Wall Lizard evolves new digestive organs (cecal valves) to be able to digest vegetation;

http://www.pnas.org/content/105/12/4792.abstract?sid=dff0e6d2-5075-4d19-80b6-ca6796404d19

and a popular literature link to the same topic;

http://news.nationalgeographic.com/news/2008/04/080421-lizard-evolution_2.html

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MrGoodBytes said:

Here you go: Sea squirts developing fully functional two-chambered hearts. Admittedly, this was due to a gene being artificially shut off or being overexpressed, but since we know that genes do that on their own too, it doesn't have any impact on the process itself.

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Edx said:

Hi,

Having a debate in another forum and the guy is saying that we havent observed speciation, of course I gave him examples of that and he is coming back with the whole lets move the goal posts trick.

But he also saying we havent seen the evolution of new organs, I would like to know if I can point to anything?

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Examination of the lizard’s digestive tracts revealed something even more surprising. Eating more plants caused the development of new structures called cecal valves, designed to slow the passage of food by creating fermentation chambers in the gut, where microbes can break down the difficult to digest portion of plants.

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rjw said:

Another good one would be the evolution of the mammalian ear from the reptile jaw. Go to talk.origins and have a look for Theobald's "29+ evidences for macroevolution".


Regards, Roland

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Naraoia said:

The problem with that is it's mostly fossil evidence and that doesn't count as "observed" with creationists. You could of course refer to embryology... but I'm quite sure it's still not direct enough evidence for a goalpost-moving creationist.

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