Shoot

... nutrition, infectious diseas, predation) than a couple of random mutations that now and then kills an individual of the species. Also, you kind of shoot yourself in the leg with that genetic disorder list you copied somewhere, because for example the sickle cell anemia you mentioned there is a ...

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...we already know how lungs evolved as an off-shoot of the intestine...In essence, your thinking is dependent on the organ already existing before it can be selected for; First, you don't know because you weren't there to see it. And I have never ...

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AFJ, the problem with your reasoning is that we already know how lungs evolved as an off-shoot of the intestine. As I mentioned before, many fish ( Corydoras catfish, for example) can swallow air from the water's surface and absorb oxygen through their intestinal lining. ...

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AFJ, the problem with your reasoning is that we already know how lungs evolved as an off-shoot of the intestine. As I mentioned before, many fish ( Corydoras catfish, for example) can swallow air from the water's surface and absorb oxygen through their intestinal lining. ...

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AFJ, you should read up on Tiktaalik: http://en.wikipedia.org/wiki/Tiktaalik FYI, lungs evolved before legs as an off-shoot from the intestine; in fact Corydoras catfish today can "breathe" through their intestinal lining as an adaptation to life in poorly-oxygenated water. ...

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