Proteins, Apes & Us (Introduction)

by David Turell , Sunday, April 08, 2012, 01:42 (4614 days ago) @ Balance_Maintained

We also see a lot of strangely fixed dates and proclamations, about which there is not really enough evidence to make such proclamations. 
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> Retrograde analysis of the fossil record is only as good as your ability to date the fossils. Even within the span of a few thousand years, C14 dating becomes quite inaccurate, -Agreed about C14. It doesn't go back very far accurately, but, there are 4-5 other isotopic methods that are said to be much more accurate, and they are actively used and agree with each other I believe within 10%. When they give a branch at 6 mya no one expects that to be on the dot.
>-> Any creature that had to deal with the same environmental pressures would have by necessity had to have come to extremely similar physiological methods of dealing with it. These methods are limited by certain facts.
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• DNA, is the blueprint for these changes and adaptations.
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• There are only a limited number of combinations of DNA molecules within the segment of the genetic code allocated to dealing with that particular scenario
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• Whatever structure is arrived at must work for the environment
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• Whatever structure is arrived at must work for the given phenotype
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> So there are some logical assumptions that stem from this:
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> Creatures in the same habitat would have to conform to the same environmental pressures to varying degrees. Further, the closer the creatures are to each other physiologically, the more likely they are to adapt in the same or extremely similar manner because that is the only viable method of adaptation for that specific pressure.
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> This suggest that you would see extreme similarities, genetically, between any creatures that posessed similar physiology and shared a similar environment, IRREGARDLESS OF ANCESTERY. -Not extreme. Chimps are over 20% different. 
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> My point is, commonalities in the genetic structure logically do not necessarily imply common decent.-We can only go by the fossils we find. By layer of Earth (see Grand Canyon pictues for guidance, and I know about the 750 million yr. great unconformity)) and by isotopic dating the dates of appearance are relatively close. Monkeys with tails precede apes and us. Our fossils with apes are all intermixed through time. We obviously descended together and initially from monkeys. We certainly didn't appear 4004 B.C.-Do you believe in descent by saltation?