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Politics : Evolution
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To: TigerPaw who wrote (1305)4/26/2006 8:12:41 PM
From: Brumar89  Read Replies (1) of 69300
 
What Darwin did was to show that supernatural causes for change were unnecessary. The natural causes are sufficent for all known changes.

There have been some specific tests. There was a proposal put out a few years ago for a trait which would not occur by natural means. The trait that was agreed upon was that of an organism with wheels. No natural mechansism was known that could support such a complete mechanical separation of one part of an organism from the rest. A literature-search was underway for any organism that had a wheeled characteristic and they actually found one. The exceptions are what really tests a proposition because the proposition must also adequately describe the loophole that allowed the exception to happen. In this case the exception was the flagella of certain bacteria which can turn all the way around like a wheel (or propellor). The explanation for the exception was in the tiny size of the flagella which allowed it to receive nutrients without a solid connection to the rest of the organism.

OKay, you've mentioned one test - that biological organisms shouldn't have wheels. Then you point out that there is an organism with a wheeled structure - actually a propeller. Normally that would mean a failure of the test.

But of course, that doesn't mean evolution by solely natural causes failed the specified test, right? - its just an exception, a loophole. Rhetoric to the rescue.

Please provide a source for the "exception" regarding the flagella receiving nutrients. I don't think "receiving nutrients" is descriptive of anything that goes on in the flagella. The flagellar structures are made of various proteins and biochemical reactions provide the power that turns the propeller.
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