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Documented evolution of new functions and behaviors in bacteria
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Documented evolution of new functions and behaviors in ... - 4/13/2008 7:41:20 AM
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Agahnim
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This was published last year, but I only recently found it: http://www.nytimes.com/2007/06/26/science/26lab.html This seems to be a falsification of Michael Behe’s claim about the types of changes that evolution is capable of producing. Each of these experiments began with bacteria belonging to a single species, with a single lifestyle. I’ll quote the part of the article describing the most relevant results: quote:
Other scientists are watching individual microbes evolve into entire ecosystems. Paul Rainey, a biologist at the New Zealand Institute for Advanced Study at Massey University, has observed this evolution in bacteria, called Pseudomonas fluorescens, that live on plants. When he put a single Pseudomonas in a flask, it produced descendants that floated in the broth, feeding on nutrients. But within a few hundred generations, some of its descendants mutated and took up new ways of life. One strain began to form fuzzy carpets on the bottom of the flask. Another formed a mat of cellulose, where it could take in oxygen from above and food from below. But Dr. Rainey is only beginning to decipher the complexity that evolves in his flasks. The different types of Pseudomonas interact with one another in intricate ways. The bottom-growers somehow kill off most of the ancestral free-floating microbes. But they in turn are wiped out by the mat-builders, which cut off oxygen to the rest of the flask. In time, however, cheaters appear in the mat. They do not produce their own cellulose, instead depending on other bacteria to hold them up. Eventually the mat collapses. The other types of Pseudomonas recover, and the cycle begins again, with hundreds of other forms appearing over time. “The interactions are everything you’d expect in a rain forest,” Dr. Rainey said. Scientists have long known that underlying these visible changes were genetic ones. But only now are they documenting the mutations that allow this evolution to happen in the first place. Dr. Palsson has been running experiments in which E. coli must adapt to a diet of glycerol, an ingredient in soap. He found that within a few hundred generations, the bacteria could grow two to three times as fast as their ancestor. He then selected some of the evolved microbes and sequenced their genome. He compared their DNA with that of their common ancestor and pinpointed a few mutations that each line had acquired. Dr. Palsson then inserted copies of these mutated genes into the ancestor and found that it now could thrive on glycerol as well. But the order in which he inserted the genes made a big difference to the bacteria. Some mutations were beneficial only if the bacteria already carried other mutations. On their own, the mutations could even be harmful. Dr. Palsson’s results offer a detailed picture of what biologists call epistasis — the intimate ways in which mutations can influence the effects of other mutations during evolution. Keep in mind, both of these experiments began with just one bacterium, Pseudomonas fluorescens in the first case and E. coli in the second. So this experiment demonstrates two things: 1: The evolution of new functions and behaviors which did not exist in the original organism, such as the ability to form “mats”, which provide an advantage to the organisms that have them. 2: The evolution of new functions that cannot exist without multiple mutations, even though on their own those mutations are often harmful. In other words, this is a type of irreducible complexity which has been observed evolving in the present. When I debated with Jhud about Behe’s claims in this area, this was the requirement he gave me for what he would need to see in order to consider Behe’s argument falsified: quote:
[…] as far as accepting evolution as the sole explanation for the development of life, what I require is a demonstration of a novel morphological change (novel organs, limb types, body plans, functional capabilities) which is the product of multiple (five in my mind is statistically improbable, and yet necessary to explain certain structures) separate yet interdependent mutations (which aren’t simply changes to genetic regulation) which have the effect of producing increased viability (meaning the population is more successful than the population from which it derived) in a separate, interbreeding population distinguished by said morphological changes. Since bacteria reproduce asexually, the “interbreeding” part isn’t possible for them, but in all other respects I think these experiments demonstrate what Jhud was demanding to see. What do the people here have to say about this?
< Message edited by Agahnim -- 4/13/2008 4:04:55 PM >
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"I like your Christ. I do not like your Christians. Your Christians are so unlike your Christ." --Mahatma Gandhi
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RE: Documented evolution of new functions and behaviors... - 4/13/2008 8:26:11 PM
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drj11
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Fascinating stuff!
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RE: Documented evolution of new functions and behaviors... - 4/14/2008 12:56:55 AM
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Rasico
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I'll be honest, I have no clue right now how to discredit that. But I also have faith theres more truth than we're seeing here, although I am by no means accusing Rainey of being dishonest. Simply put, if nothing else comes from this then this is indeed powerful positive evidence for evolution at the bacterial level. I'm also not versed well enough in this subject to actually comprehend everything said here, so I'll leave that to the others. But I challenge those who believe as I do, and are versed in the material to investigate it and not ignore this post.
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RE: Documented evolution of new functions and behaviors... - 4/14/2008 6:03:22 AM
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EverLearning
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quote:
ORIGINAL: Rasico I'll be honest, I have no clue right now how to discredit that. So that is your first inclination when you read that? Interesting to say the least.
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RE: Documented evolution of new functions and behaviors... - 4/14/2008 3:21:25 PM
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Rasico
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Ha ha I wouldn't say thats my first inclination at all, its more like hmmmm. Obviously I disagree with the claim, but at the moment I can't actually disprove it. Thats what I mean.
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RE: Documented evolution of new functions and behaviors... - 4/14/2008 3:53:38 PM
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DanJames
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quote:
ORIGINAL: Rasico I'll be honest, I have no clue right now how to discredit that. But I also have faith theres more truth than we're seeing here, although I am by no means accusing Rainey of being dishonest. Simply put, if nothing else comes from this then this is indeed powerful positive evidence for evolution at the bacterial level. I'm also not versed well enough in this subject to actually comprehend everything said here, so I'll leave that to the others. But I challenge those who believe as I do, and are versed in the material to investigate it and not ignore this post. Rasico, the purpose of being a skeptic is NOT to discredit scientific research to which we are exposed. The purpose is to find out what the truth is. If God's word is true, then information about the natural realm included in His word is true. You shouldn't want to disprove or discredit any research. Just have some discernment to know when a determination based on the worldview of the interpreter has been made. Now I'm gonna go ahead and read the article.
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RE: Documented evolution of new functions and behaviors... - 4/14/2008 4:17:02 PM
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DanJames
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Very fascinating, indeed. When I said that bacteria can be promiscuous with their genetic material, I guess I had no idea what I was talking about until now.
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RE: Documented evolution of new functions and behaviors... - 4/15/2008 1:30:15 AM
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Agahnim
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quote:
Very fascinating, indeed. When I said that bacteria can be promiscuous with their genetic material, I guess I had no idea what I was talking about until now. I don’t think they’re really more “promiscuous” than any other organism; they just reproduce faster. The changes described in this article required several hundred generations to occur, which would take several hundred years for anyone to observe in an organism that reproduces once per year. But since bacteria reproduce so much faster than that, it’s possible to directly observe these sorts of large-scale changes evolving in them. Has this data altered your opinion of evolution at all, or did you already believe that mutations were capable of producing these types of new abilities and lifestyles?
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"I like your Christ. I do not like your Christians. Your Christians are so unlike your Christ." --Mahatma Gandhi
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RE: Documented evolution of new functions and behaviors... - 4/15/2008 1:46:19 AM
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Rasico
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quote:
ORIGINAL: DanJames quote:
ORIGINAL: Rasico I'll be honest, I have no clue right now how to discredit that. But I also have faith theres more truth than we're seeing here, although I am by no means accusing Rainey of being dishonest. Simply put, if nothing else comes from this then this is indeed powerful positive evidence for evolution at the bacterial level. I'm also not versed well enough in this subject to actually comprehend everything said here, so I'll leave that to the others. But I challenge those who believe as I do, and are versed in the material to investigate it and not ignore this post. Rasico, the purpose of being a skeptic is NOT to discredit scientific research to which we are exposed. The purpose is to find out what the truth is. If God's word is true, then information about the natural realm included in His word is true. You shouldn't want to disprove or discredit any research. Just have some discernment to know when a determination based on the worldview of the interpreter has been made. Now I'm gonna go ahead and read the article. You seem to misinterpret what I meant, which is probably my fault, I'm generally not precise. I very much see this research as valid and well intentioned. The data is valid as far as I'm concerned in other words. I am specifically questioning the interpretation. The claim is the interpretation of the data, or so I think. The claim I see from he OP is that this research falsifies irreducible complexity. Of course I reserve the right to be wrong, but I do not think so at this time. I also agree that this data does indeed appear to falsify irreducible complexity. Perhaps this is more clear?
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RE: Documented evolution of new functions and behaviors... - 4/15/2008 5:53:07 AM
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EverLearning
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quote:
ORIGINAL: Rasico You seem to misinterpret what I meant, which is probably my fault, I'm generally not precise. I think it hard to misinterpret what you originally wrote. It was pretty straight forward.
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Normal people believe that if it ain't broke, don't fix it." Engineers believe that "if it ain't broke, it doesn't have enough features yet
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RE: Documented evolution of new functions and behaviors... - 4/15/2008 8:50:50 AM
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PromiseLander
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Mutations do not create new information... Good grief people... It's like people claiming that the "big bang" started everything as we know it. That is so stupid that it defies logic - when was the last time that you EVER heard of an explosion ever causing order? Well, except for that time that I tossed a hand grenade into my office and the subsequent explosion stacked all my papers into neat ingoing and outgoing files as well as finished a few drawings of houses that I was working on, and don't you know it, that flying shrapnel even poured me a cup of coffee! Look, plain and simple, mutations do not create new information - the information was already coded into the DNA of the organism, the mutation merely brought it to the surface, highlighted it, brought it into use, however you want to call it. Look at the different types of dogs - each breed of dog is nothing but a mutation of a gene to highlight a certain aspect of the dog's DNA that was already there. Merely aquiring a different ability, or a new use for encoded information doesn't support evolution - THE ONLY THING that would support evolution would be for a cat to turn into a parrot. (So to speak, but you get the idea) That whole survival of the fittest thing, and "speciation" does NOT support evolution... You only get a new KIND of dog, or a new KIND of cat - you do not get dog into cat transformations. As much as evolutionists would like to say that speciation supports them, it doesn't - it supports Biblical Creation. Bactieria getting new abilities? Guess what? It's STILL bacteria. Sorry evolutionists, no points this round.
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RE: Documented evolution of new functions and behaviors... - 4/15/2008 9:04:37 AM
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iluvatar
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quote:
ORIGINAL: PromiseLander Mutations do not create new information... Good grief people... It's like people claiming that the "big bang" started everything as we know it. That is so stupid that it defies logic - when was the last time that you EVER heard of an explosion ever causing order? Good grief, the big bang wasn't an explosion in the sense people normally think of. Good grief, a uniform cloud of matter with a density high enough that gravity plays an important role in its matter distribution is actually in a MORE ordered/LESS entropic state than it would be after portions of it collapsed/coalesced into separate bodies. -Dan.
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RE: Documented evolution of new functions and behaviors... - 4/15/2008 9:12:19 AM
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DanJames
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quote:
ORIGINAL: Agahnim quote:
Very fascinating, indeed. When I said that bacteria can be promiscuous with their genetic material, I guess I had no idea what I was talking about until now. I don’t think they’re really more “promiscuous” than any other organism; they just reproduce faster. The changes described in this article required several hundred generations to occur, which would take several hundred years for anyone to observe in an organism that reproduces once per year. But since bacteria reproduce so much faster than that, it’s possible to directly observe these sorts of large-scale changes evolving in them. Has this data altered your opinion of evolution at all, or did you already believe that mutations were capable of producing these types of new abilities and lifestyles? Well from what I understand from my conversations with someone who has great authority to have an opinion on the matter, bacteria are "promiscuous" with their DNA in a sense that is fundamentally different from multicellular organisms. They do actually undergo processes that induce mutations in themselves and even swap DNA with other organisms, all in an effort that I interpret to be survival. It's not life in fast forward, it's life at the casino, and the ones that strike it lucky are the ones that survive.
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RE: Documented evolution of new functions and behaviors... - 4/15/2008 9:49:57 AM
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EcclesFruitcake
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quote:
THE ONLY THING that would support evolution would be for a cat to turn into a parrot. (So to speak, but you get the idea) That whole survival of the fittest thing, and "speciation" does NOT support evolution... You only get a new KIND of dog, or a new KIND of cat - you do not get dog into cat transformations. As much as evolutionists would like to say that speciation supports them, it doesn't - it supports Biblical Creation. Please tell me what the original discrete kinds are then and which particular traits are the unique ones used to identify an original kind - what keeps a cat "a cat" said the parrot. That is, once you accept that speciation happens, as you have, what mechanism prevents a continuous lineage from one 'kind' to something that is more reminiscent of another kind.
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RE: Documented evolution of new functions and behaviors... - 4/15/2008 10:05:51 AM
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DanJames
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quote:
ORIGINAL: EcclesFruitcake quote:
THE ONLY THING that would support evolution would be for a cat to turn into a parrot. (So to speak, but you get the idea) That whole survival of the fittest thing, and "speciation" does NOT support evolution... You only get a new KIND of dog, or a new KIND of cat - you do not get dog into cat transformations. As much as evolutionists would like to say that speciation supports them, it doesn't - it supports Biblical Creation. Please tell me what the original discrete kinds are then and which particular traits are the unique ones used to identify an original kind - what keeps a cat "a cat" said the parrot. That is, once you accept that speciation happens, as you have, what mechanism prevents a continuous lineage from one 'kind' to something that is more reminiscent of another kind. EFC, there may very well be no recourses in the world that catalogs the original kinds with DNA analysis, but I would say that it would probably be the only conclusive way to say, "We're pretty sure we have the original kinds." When you're ready to do the research, I'll get you the grant paperwork to fund that research. Speciation does happen, but if you're going to tell me that breeding is going to change a cat into a parrot, you have to be mistaken. How are you going to breed scales? Are you going to produce feathers with artificial selection? How about those hollow bones with internal support structures? While you're at it, hook those bones up to the respiratory system, you might need it for flying, the programming for which you're going to need to include in the animal. You wanna do that by breeding a cat?
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RE: Documented evolution of new functions and behaviors... - 4/15/2008 10:27:53 AM
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PromiseLander
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quote:
ORIGINAL: EcclesFruitcake quote:
THE ONLY THING that would support evolution would be for a cat to turn into a parrot. (So to speak, but you get the idea) That whole survival of the fittest thing, and "speciation" does NOT support evolution... You only get a new KIND of dog, or a new KIND of cat - you do not get dog into cat transformations. As much as evolutionists would like to say that speciation supports them, it doesn't - it supports Biblical Creation. Please tell me what the original discrete kinds are then and which particular traits are the unique ones used to identify an original kind - what keeps a cat "a cat" said the parrot. That is, once you accept that speciation happens, as you have, what mechanism prevents a continuous lineage from one 'kind' to something that is more reminiscent of another kind. Well, animals have changed a great deal over time - keeping within their kinds that is. Breeding changes, environmental changes and so forth - I suppose a very readily apparent environmental type of change could be human skin color - but humans are still humans, and though superficially changed from their original ancestor (scientists now even say that all humans are decended from one woman, and wouldn't you know it, they've decided to call her Eve) but they are still humans - same as the original model. What are the original "kinds" of animals? I don't know, I'm no naturalist or scientist, and have never claimed to be - let's just say there are a LOT. As to what mechanism is in place that prevents one "kind" to slowly change into another "kind?" Quite simply, that is God. God's word tells us that He created them according to their KINDS. As for humans, Scripture tells us that we are "fearfully and wonderfully made" and "created in the image of God." There is no room for evolution in the creation story - to say that man started as a lower life form is to say that God was a lower life form. There's a Greek word for that - bologna. Asking one kind of animal to change into another kind is similar to asking a severed human leg to grow back - some things just don't happen. (although they do in starfish!) So I suppose if a human leg ever did grow back from a bloody nub at the hip, he would then be classified as a type of starfish. (You see how ridiculous this sounds? That's evolutionary theory for you) Just because there are similar traits, that doesn't mean they are the same "kind." Example - I have a butt. An elephant has a butt. WOO HOO!!! I can now feed myself peanuts from my nose because I am now an elephant! Hey, that's the same logic that pseudo-science tells us about the dinosaurs to birds theory. *HINT - birds were created before "dinosaurs" - "dinosaurs" to be read as "animals"
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RE: Documented evolution of new functions and behaviors... - 4/15/2008 12:33:44 PM
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drj11
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quote:
ORIGINAL: PromiseLander quote:
ORIGINAL: EcclesFruitcake quote:
THE ONLY THING that would support evolution would be for a cat to turn into a parrot. (So to speak, but you get the idea) That whole survival of the fittest thing, and "speciation" does NOT support evolution... You only get a new KIND of dog, or a new KIND of cat - you do not get dog into cat transformations. As much as evolutionists would like to say that speciation supports them, it doesn't - it supports Biblical Creation. Please tell me what the original discrete kinds are then and which particular traits are the unique ones used to identify an original kind - what keeps a cat "a cat" said the parrot. That is, once you accept that speciation happens, as you have, what mechanism prevents a continuous lineage from one 'kind' to something that is more reminiscent of another kind. Well, animals have changed a great deal over time - keeping within their kinds that is. Breeding changes, environmental changes and so forth - I suppose a very readily apparent environmental type of change could be human skin color - but humans are still humans, and though superficially changed from their original ancestor (scientists now even say that all humans are decended from one woman, and wouldn't you know it, they've decided to call her Eve) but they are still humans - same as the original model. You are talking about mitochondrial eve... its fascinating, but you are drawing the wrong conclusions... its also estimated she lived ~140,000 years ago.. not exactly in tune with young earth: "Mitochondrial Eve is the most recent common ancestor (MRCA) of all humans via the mitochondrial DNA pathway, not the unqualified MRCA of all humanity. All living humans can trace their ancestry back to the MRCA via at least one of their parents, but Mitochondrial Eve is defined via the maternal line. Therefore, she necessarily lived much longer ago than the MRCA of all humanity. The existence of Mitochondrial Eve and Y-chromosomal Adam does not imply the existence of population bottlenecks or a first couple. They each lived within a large human population at a different time. Some of their contemporaries have no living descendants today, and others are ancestors of all people alive today. No contemporary of Mitochondrial Eve or Y-chromosomal Adam is an ancestor of only a subset of people alive today, because both of them lived much longer ago than the identical ancestors point. " http://en.wikipedia.org/wiki/Mitochondrial_Eve
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RE: Documented evolution of new functions and behaviors... - 4/15/2008 12:34:28 PM
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Jhud
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I wanted to jump in here before the thread gets too far off topic. I would have responded earlier, but I wanted to take a little time to read through the relevant literature, see exactly what has been found, and what were the factors that lead to it. Part of the problem with the OP as it is stated is that it is based on a two page very generalized NYT story, which briefly refers to three different studies dealing with three different species, Escherichia coli, Pseudomonas, Myxococcus Xanthus. Of course, as is typical with such articles, it refers to all the changes that occurred to the organisms in the various experiments as ‘evolution’ without providing particular details about the actual causes of those changes. Indeed, the article briefly acknowledges that the mechanisms that actually caused the changes are at this point unknown: But Dr. Velicer has no idea at the moment how the mutation brought about the remarkable transformation in behavior. The mutated segment of DNA actually lies near, but not inside, a gene. It is possible that proteins latch on to this region and switch the nearby gene on or off. But no one actually knows what the gene normally does. Mutations like this one, Dr. Velicer said, “make for a much more complicated story.” It is a story he and other scientists are looking forward to revealing. So to simply place them under the rubric of ‘evolution’ or claim they contradict Behe is premature at best, somewhat disingenuous at worst. That being said, a brief primer, utilizing another recent find dealing with change in a bacterium and antibiotic resistance that I have posted previously. It will become evident why this is relevant in a short while. In this paper we are dealing with antibiotic resistance Escherichia coli, one of the bacterium being considered in the NYTs article. Antibiotic resistance is often depicted as a ‘classic’ evolutionary case. You have a population of bacteria, you apply an antibiotic which acts as a selective factor, the bacteria which survive convey that resistance to their progeny, and viola! One evolves a population of resistant bacteria. The causes of this resistance from a genetic perspective have been little known. In typical evolutionary fashion, it is often assumed to derive from a genetic mutation which conveys a novel capability to the organism which has it. The paper here chronicles something quite different. Rather than a novel characteristic, the effect of the antibiotic on the population seems to promote enhanced regulation of already extant capabilities, or in this case, a structure called an efflux pump. The purpose of this pump is to (surprise, surprise) pump toxins the organism encounter in the environment out of the cellular membrane. In the presence of antibiotic, the genes that control the pump increase the activity of the pump, which in turn pumps more of the toxin (in this case the antibiotic) out of the cell, and create ‘resistance’ to the antibiotic. As the paper details, it is a non-mutational environmental response: Living organisms have the capacity to adapt to changing environments without the need to rely on mutations, which are infrequent and thereby slow, to be incorporated into a population in a given environment. In the case of the efflux of toxic compounds, physiological adaptation of a cell to a given substance in a given environment begins with an event that takes place at or within the cell envelope and results in a sensor type of stress response. This eventually results in genetic activity that encodes for additional units of that same efflux pump that extrude a broad range of substrates. The addition of more efflux pumps into the cell envelope increases the survival of the organism. Now, what relevance does this have to the topic at hand? Well, the author of the OP wants a quick and easy means of looking at what are rather sophisticated suite of biological capabilities; namely ‘mutations did it’. I would suggest that upon further investigation, the researchers will find complex regulatory process that better explain the response of these organisms to the various environmental stressors that they have been subjected to. Indeed, I think the answers would be apparent faster if they were inclined to consider them as the researchers considering bacterial resistance did. Indeed, I would say this rises to the level of a prediction, based on an ID paradigm. And this is one of my problems with evolutionary thinking; it undermines actual understanding of biological processes by presuming, as the author did, that they are primarily Neo-Darwinian in nature – and that is detrimental in a much greater way when one considers that much of this research impacts the health of humans and environments. Following rabbit trails only hurts us. Now, as I said I read through some of the more detailed literature concerning the cases the NYTs reports, something I don’t think the author of the OP bothered to do. In my brief reading I would say that the changes are less ‘evolutionary’ than the OP supposes. In fact, it seems to be the case in terms of Lenski’s ‘heat resistant’ bacteria that we are dealing with more of these sorts of changes. His paper, Evolutionary changes in heat-inducible gene expression in lines of Escherichia coli adapted to high temperature chronicles what seem to be modifications to currently existing genes as a stress response: Genes encoding molecular chaperones and ATP-dependent proteases, key components of the cytoplasmic stress response, exhibit relatively little expression change; whereas genes with periplasmic functions exhibit significant expression changes suggesting a key role for the extracytoplasmic stress response in the adaptation to high temperature. Following acclimation at 41.5°C, two of the three lines exhibited significantly improved survival at 50°C, indicating changes in inducible thermotolerance. Thus evolution at high temperature led to significant changes at the molecular level in heat-inducible gene expression and at the organismal level in inducible thermotolerance and fitness. So I would say that no, this isn’t indicative of the evolutionary change one should expect if neo-Darwinism is true. Another paper (Long-term experimental evolution in Escherichia coli. XI. Rejection of non-transitive interactions as cause of declining rate of adaptation) , again by Lenski, demonstrates how, over time, adaptation actually declines, and the rate of change actually plateaus. This would seem to verify Behe's contention that there is a limit to mutational evolutionary change. So I would say that while the NYTs article presents intriguing possibilities, on closer inspection it provides little support for Neo-Darwinism. Indeed, it doesn't even proffer that any of the organisms speciated, much less followed unique evolutionary paths. Just a few short thoughts on the subject.
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Jack “I mean to live my life an obedient man, but obedient to God, subservient to the wisdom of my ancestors; never to the authority of political truths arrived at yesterday at the voting booth” William F. Buckley Jr. 1925-200
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RE: Documented evolution of new functions and behaviors... - 4/15/2008 12:47:20 PM
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DanJames
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quote:
Indeed, I think the answers would be apparent faster if they were inclined to consider them as the researchers considering bacterial resistance did. Indeed, I would say this rises to the level of a prediction, based on an ID paradigm. ... Just a few short thoughts on the subject. Jhud for president!
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RE: Documented evolution of new functions and behaviors... - 4/15/2008 1:53:29 PM
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Agahnim
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Jhud, I’d like to make sure I understand your point: it seems like what you’re saying is that since the people performing these experiments haven’t documented the exact order and nature of these changes, we can’t assume them to be only the result of random mutations. Some sort of design process might have been involved as well. Is that an accurate summary of your post? If that’s correct, here’s what I have to say about this. Keep in mind, this test was performed in a laboratory. It didn’t merely document a change that had already occurred; the change took place during the test, and there wasn’t anybody sneaking into the laboratory at night to insert new genes into the bacteria. So if these changes were caused by some sort of designer, it would have to be a completely invisible, undetectable designer who intervenes in life on a day-to-day basis. Not even young-earth creationism predicts something like this. Creationists believe that life had a supernatural origin, but I’ve never encountered one who believes that God is continuing to directly create new animals behind our backs. The Bible doesn’t say anything to suggest this, in any case. If this is what you believe—that a “designer” is actively altering the results of these experiments—how would it be possible to test or falsify this idea? At least for the moment, nobody is able to directly observe mutations on the molecular level; the only thing that’s possible is to see when and where the mutation occurred by comparing the organism’s genome before and afterwards. If this designer can alter the genes of an organism in a completely undetectable manner, how could one ever falsify the idea that he/she/it was responsible for a certain change?
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"I like your Christ. I do not like your Christians. Your Christians are so unlike your Christ." --Mahatma Gandhi
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RE: Documented evolution of new functions and behaviors... - 4/15/2008 2:04:54 PM
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Jhud
Posts: 6781
Joined: 4/11/2005
From: Lake Wobegon
Status: offline
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quote:
Jhud, I’d like to make sure I understand your point: it seems like what you’re saying is that since the people performing these experiments haven’t documented the exact order and nature of these changes, we can’t assume them to be only the result of random mutations. Some sort of design process might have been involved as well. Is that an accurate summary of your post? I am not sure how you got that out of what I said. If you read what I posted regarding the regulation of the activity of efflux pumps, and how I related it to the findings that were reported in NYTs, I am simply saying that the changes that occured can be better explained by built in capabilities in these microorganisms in response to various factors and stressors in the environment. And I further posted that one of the papers dealing specifically with a case mentioned in the Times seems to indicate exactly that. So as an IDist, I would predict that the processes, which are currently little known, will be found to be more like the case of the development of antibiotic resistance than a case of mutational change leading to novel capabilities. Is that clear?
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Jack “I mean to live my life an obedient man, but obedient to God, subservient to the wisdom of my ancestors; never to the authority of political truths arrived at yesterday at the voting booth” William F. Buckley Jr. 1925-200
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RE: Documented evolution of new functions and behaviors... - 4/15/2008 2:52:23 PM
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Agahnim
Posts: 161
Joined: 2/27/2008
Status: offline
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quote:
I am not sure how you got that out of what I said. If you read what I posted rega | | | |