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Smoking-Gun Evidence of Man-Monkey Kindred: Episode II... Tails

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Dr Jack
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From: Immigrant in the land of Deutsch
Joined: 07-14-2003
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Message 30 of 127 (202096)
04-25-2005 7:08 AM 		Reply to: Message 29 by Rrhain
04-25-2005 3:14 AM

Vision seems to have independently arisen at least 40 times. What is so surprising about it having developed twice within a major taxonomic branch?
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But, Rrhain, all amphibian groups have eyes and pretty similar kinds of eyes at that. For two frogs within the same genus to have seperately evolved eyes, one would have had, for some unclear reason, have lost it's eyes altogether and then evolved them all over again. That's a pretty unlikely scenario; especially given that both frogs are from the same genus and thus not awfully disimilar in other ways.
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Dr Jack
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Posts: 3514
From: Immigrant in the land of Deutsch
Joined: 07-14-2003
Member Rating: 8.3

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Message 48 of 127 (220337)
06-28-2005 5:37 AM 		Reply to: Message 44 by randman
06-28-2005 2:56 AM

Re: Is this true?
It depends on the exact context: homologous structures between examples of convergent evolution do not share developmental patterns or genes. This does not refute evolution but does provide a weak argument against design-hypothesises.
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