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Politics : Evolution -- Ignore unavailable to you. Want to Upgrade?

To: Brumar89 who wrote (1310)	4/27/2006 12:14:36 PM
From: TigerPaw	Read Replies (1) \| Respond to of 69300

Did the light senstive patch just appear along with an underwater membrance covering it and an optic nerve attached to carry a signal to a brain? Now we have 3 things that have to show up simultaneously. IOW we have irreducible complexity. I think the membrane would come first, it's essential waterproofing for sea creatures. No brain is necessary, many single celled bacteria will swim toward light (it keeps them from swimming down to the depths of the ocean where they are unlikely to encounter food). Selection works on all aspects of a creature at once. There must, of course, be opportunity in the form of some variation for the selection to change the creature's form. ( and creature could just as easily be a plant in this statement). Since the eye is soft, there are no fossils that I know of so I can only guess about the order. (The DNA itself could be considered a fossil of sorts). A creature with an improved trait competes most vigorously with those of it's species without the trait. This is because they share the same niche in the ecosystem and from the Malthus hypothesis they are likely to eventually find the niche crowded. This means the trait will tend to be relatively quickly spread through the population. TP