If you found evidence that one living thing changed its DNA completely, that would falsify evolution instantly. The interrelatedness of DNA is one of the most powerful evidences for evolution. For example, 70% of the genes in yeast also occur in humans.
But if all you're looking for is an example of the creation of new species via crossbreeding, take a look at wheat and rye. There are several dozen species of wheat and rye in the world. Some species of wheat can interbreed with some species of rye, and some can't. Sometimes you have species A that can interbreed with both species B and C, but B and C cannot interbreed with each other. Based on DNA analysis, a number of species are known to be natural crossbreeds of other natural species. And human beings have created new species to (call triticale) by crossbreeding wheat and rye.
2007-01-12 17:55:45
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answer #1
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answered by Keith P 7
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I think you have misconceptions. Our own DNA is not completely different from, say, a chimp, or even a pig. In fact, it's more similar than not.
When two "species" are crossed, such with lions and tigers, the off spring is almost always, but not always, infertile.
That is to say, sometimes the off spring is fertile and can produce viable offspring of their own.
You will not see a cow turn into a whale or anything of the sort. If you could live long enough, you may see cows or whales give rise eventually to something that doesn't look like a cow or a whale.
Until you find the fountain of youth you will have to settle for smaller changes.
2007-01-09 18:30:39
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answer #2
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answered by minuteblue 6
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How about transitional fossils - if you're christian (I suspect you are) you'll have been taught all about the missing link - there's actually no such thing.
You can explore the evolution of whales which is a fascinating subject in its own right - take a look at 'ambulocetis' or the various different types of hominids - religious people keep asking for a 'transitional' form between ape and human (though humans ARE apes) but there are already dozens.
I'd go in to what it means to have a scientific theory (http://www.stephenjaygould.org/library/gould_fact-and-theory.html) but I suspect you're one of the certain kind of religious people that just dont want to listen and comes on to point out what you perceive as flaws in evolutionary theory. In fact there are none. If there was a single piece of evidence contradicting the theory of evolution then it would have been rejected and creationists have been trying for nearly 150 years.
If you were open minded and looked at the evidence you'd accept evolution as a fact.
2007-01-08 23:20:56
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answer #3
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answered by Anonymous
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You must understand that evolution is something that happens to a population over generations, not to individuals. The true definition is the change in allele frequency in a gene pool over time. So if a certain gene becomes more common in a population over several generations because it provides an advantage to the ones who have that gene, that's evolution.
Also, not all evolution is adaptive. There is such thing as genetic drift where change in gene frequency in a population is purely due to chance.
Vote for Trey123. That's a good example. The clearest examples of evolution can be observed in microorganisms... and people have done genetic analysis to support it.
2007-01-08 19:22:36
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answer #4
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answered by Ms. K. 3
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EVOLUTION *IS* ADAPTATION ... SORRY NON-DARWINIAN.
Evolution is "slow change in a species as a response to environment."
Adaptation is "change in response to environment."
Thus evolution IS simply adaptation at the species level.
When you say "any living thing can adapt to its environment", if a species is a "living thing", then ... THAT'S EVOLUTION. Creationists try to call it "microevolution", but they concede that it's a form of 'evolution' nonetheless.
And then you want "proof that one living thing changed its DNA completely" ... have you been asleep lately? Ape and human DNA are known to be about 95% identical. So things don't have to "change their DNA completely". They only have to change their DNA a very little bit.
The proof of common descent between apes and humans (not apes evolving *into* humans, which nobody believes) is right there in the genes and the DNA. The proof of common descent between whales and arteriodactyls is in the genes and the DNA. Genes and DNA read like a roadmap of ancestry. They can tell family trees over hundreds of years, the history of human migrations over thousands of years, and yes relations between species over millions of years. They not only tell us what diverged from what, but exactly *when* they diverged (Google "molecular clock"). And in all cases this DNA evidence correpsonds exactly with when the fossils appear in the fossil record.
The DNA is a roadmap of ancestry. The DNA *is* the evidence. (Actually one type of evidence among dozens.)
2007-01-08 19:00:37
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answer #5
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answered by secretsauce 7
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The virus that motives AIDS mutates or evolves at a swifter than everyday fee. this is the reason it is so deadly. It mutates by potential of particular fixed regulations proposed by potential of Charles Darwins and Mendelian concpets of organic and organic evolution and heredity. The Sickle cellular trait this is predominantly in Africans is the consequences of a selective tension against Mallaria. pores and skin and eye shade are examples of evolution figuring out on particular benefitial traits for a definite climate. White skinned people or Northern residing people are much less companies to frost chew yet extra companies to sunlight burns. the choice is genuine for darker skinned peoples who originated in Tropical or semi tropical climates. We dont see monkeys turning out to be people. because of the fact, in complicated organisms like apes. exchange is seen in 500 000 year periods. bear in ideas,merely when you consider which you haven't any longer have been given consistently to stay to make certain the terrific consequences. does no longer mean that evolution does not exist.
2016-11-27 22:07:58
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answer #6
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answered by ? 4
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Yes! The finches in the Galapagos actually change according to conditions. Noticing these changes is what confirmed for Darwin his theory of evolution.
2007-01-08 18:20:38
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answer #7
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answered by Anonymous
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What you have failed to realise is that a theory is not proven. If it were, it would no longer be a theory. I understand the question, and no, there is no no hard proof of evolution, but the adaptation can be observed even within a hundred years in humans alone. Do observations make it a fact? In theory, yes, but in practicality, not really.
I know someone's going to argue with me. If you intend to, I will not get into it with you. I know how so many people seem to think a theory is a collection of facts. That's fine and dandy, but doesn't make it a proven fact.
2007-01-08 18:17:05
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answer #8
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answered by Gray 6
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There are lots of examples of this, do a google for Speciation and Transitional fossils.
I was going to provide the links myself, but it is obvious that you don't want answers. Here is a hint:
www.talkorigins.org
2007-01-09 01:43:05
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answer #9
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answered by RjKardo 3
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Germs. Due to our antiobiotic crase, germs are becoming resistant. thus, penicillian no longer works as well as it used to.
Yes, evolution is hard to believe, but on the moclecular level, it's happening right before us.
2007-01-08 18:12:50
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answer #10
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answered by Trey123 3
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