![]() |
|
| The Debate Forums | Blogs | | | Donate | Register (it's free) | Chatroom | Search | Today's Posts | Mark Forums Read |
| ||||||
|
| | Thread Tools |
| | #61 (permalink) (top) | |
| Glad to be back! Location: Vernal, UT Posts: 1,725 | Quote:
Fixed ideas are like a cramp in the foot - the best remedy against it is to tread on it. -Søren Kierkegaard | |
| | |
| | #62 (permalink) (top) | |
| Anarcho-capitalist Posts: 296 | Quote:
After all God's supposed to be that first organism. | |
| | |
| | #63 (permalink) (top) | |
| Anarcho-capitalist Posts: 296 | Quote:
ape to human" it tiny compared to the "leap" from fish to amphibians or from dinosaurs to birds (if there is such). Of course there are no "leaps" in fact, just each generation getting slightly more human-like (on average). As for the idea that monkeys still being "at the same level they have been for the longest time" that has nothing to do with our own evolution. Monkeys are how they are because that design succeeds in reproducing well enough to survive. We are how we are for the same reason. Penguins are how they are because aquatic flightless birds are a design that works but that doesn't imply that birds that are not flightless don't work. Read up on the subject some time. | |
| | |
| | #64 (permalink) (top) | |
| Glad to be back! Location: Vernal, UT Posts: 1,725 | Quote:
Technically, evolution dosen't explain the origin of the first life form. Evolution presopposes the existance of life and merely shows how a bacteria can change into an organism that is now typing at a keyboard. Evolution explains how life changes, not how it got here. What you are asking about is the theory of abiogenesis: life from non-life. There are many good methods for abiogenesis that have been proposed, and I will not describe then here. A google search should do that for you, search for "abiogenesis". Abiogenesis isn't the only theory for the creation of life though. You have panspermia, which is archeobacteria coming on an asteroid (actually more plausible than it sounds). And you also have creationism - that god did it. There is actually no evidance that God didn't seed the primordial oceans with primitive archeobacteria. There is no evidance for it either, but such a theory is plausable. Fixed ideas are like a cramp in the foot - the best remedy against it is to tread on it. -Søren Kierkegaard | |
| | |
| | #65 (permalink) (top) | |
| Glad to be back! Location: Vernal, UT Posts: 1,725 | Quote:
You want to know about the leap? One word: Neoteny. Neoteny is the evolutionary phenominon when a larval (juvinile) form of an animal becomes sexually mature. This gets a species out of an evolutionary "dead end". This is a well-documented occurance in many species, and there is myriad evidance that humans came out of a neotenic schism with chimps. If you look at body proportions and gene expression ratios in juvinile chimps, you will see a striking similarity with humans. Fixed ideas are like a cramp in the foot - the best remedy against it is to tread on it. -Søren Kierkegaard | |
| | |
| | #66 (permalink) (top) | ||||
| Preternatural Posts: 34 | Quote:
Quote:
Quote:
Quote:
LYCAN | ||||
| | |
| | #67 (permalink) (top) |
| Sedimentary Rock Location: Bowling Green,KY Posts: 4 | The theory of evolution is a theory of the development of the present species characteristics and how they developed. It includes the concepts that the forces which created the species are, selective breeding and survival of the fittest and the genetic transformation of creatures results in an improved species which fits the environment even when the envrionment changes. The book which explains the theory is, "Origin of Species " by Charles Darwin. |
| | |
| | #68 (permalink) (top) |
| Glad to be back! Location: Vernal, UT Posts: 1,725 | Lycan: I do not mean to be crass or insensative toward a religious testimony being borne in this thread, but this section is titled "science and technology". Unless you are discussing science, take it to religion. Unless you want to take a scientifically empyrical approach to religion... but that normally dosent work. Fixed ideas are like a cramp in the foot - the best remedy against it is to tread on it. -Søren Kierkegaard |
| | |
| | #69 (permalink) (top) | |
| Glad to be back! Location: Vernal, UT Posts: 1,725 | Quote:
Fixed ideas are like a cramp in the foot - the best remedy against it is to tread on it. -Søren Kierkegaard | |
| | |
| | #71 (permalink) (top) | |
| Sedimentary Rock Location: Bowling Green,KY Posts: 4 | Quote:
The book is available at the above link if some have not read it recently as I suspect. Beauty is truth and Tuth beauty. | |
| | |
| | #72 (permalink) (top) | ||||
| Preternatural Posts: 34 | so this is ok..... Quote:
Quote:
Quote:
Quote:
LYCAN | ||||
| | |
| | #73 (permalink) (top) |
| Glad to be back! Location: Vernal, UT Posts: 1,725 | Come come now, you know the answer. All of the posts you quote are specifically in relation to how science is perceived in relation to science. Basically the coincidance of science with other explinations. Your post was a testimony. You stated a religious opinion with only religious support. Fixed ideas are like a cramp in the foot - the best remedy against it is to tread on it. -Søren Kierkegaard |
| | |
| | #74 (permalink) (top) |
| THROBBIN ROBIN Location: USA Posts: 311 | Genetic changes still occur in many organisms today. Did you know 100 yrs ago, blonde was the #1 natural hair color? Now it is estimated that natural blondes will be extinct around 2060. Or how about the fact that Salmon fish born in the wild are less effected by certin chemicals than raised fish. Its all evolution baby! But why can't evolution and religion go hand in hand? If there is a higher being, maybe it guided evolution? Its no use to deny evolution exists, unless, of course, you want to deny the evidence. DON'T TAKE AWAY MY RIGHTS JUST BECAUSE YOU DON'T EXERCISE YOURS. Better to be thought a fool with ones mouth shut, than to speak and remove all doubt |
| | |
| | #75 (permalink) (top) |
| Glad to be back! Location: Vernal, UT Posts: 1,725 | There are many silly people who claim a delineation between macroevolution and and microevolution. They claim that the only changes we have observed (hair color and the lke) are micro, while changes like emerging from the sea are macro, and unproven. The fallacy of course is that if enough microevolution ocurs in the same direction you get macroevolution, so by admitting one you get the other. But people still try... Fixed ideas are like a cramp in the foot - the best remedy against it is to tread on it. -Søren Kierkegaard |
| | |
| | #76 (permalink) (top) |
| THROBBIN ROBIN Location: USA Posts: 311 | exactly, its not like we just grew legs one day and started to walk. It took hundreds of millions of years. DON'T TAKE AWAY MY RIGHTS JUST BECAUSE YOU DON'T EXERCISE YOURS. Better to be thought a fool with ones mouth shut, than to speak and remove all doubt |
| | |
| | #77 (permalink) (top) | ||
| Market Anarchist Location: United States Posts: 652 | Quote:
Quote:
Selective mutagenesis is environmentally-driven change. That is, the success, failure, or indifference of a mutation as well as the likelihood of that mutation to occur, is influenced by the pressures of natural selection. This is not to say selective mutagenesis will apply pressure for a specific result, the result will be whatever it may be. By saying "selective pressures" you are only saying that the conditions may or may not be right for a certain mutation to happen. In reality, scientists have no way to predict mutations, and there is no way to tell from the start whether a mutation will be "good" or "bad" or have no effect whatsoever. When pressure is applied, the rate of mutation will be dictated by the force of the pressure. However, despite wanes and waxes in mutation rates, the number of beneficial, neutral, and deleterious mutations always remains proportionate. There is no more or less likelihood that a "good" or "bad" mutation may result. Adaptive mutagenesis refers to endogenous change; that is, change initiated from within the organism itself. Theoretically, this change is not accomplished through the use of machines, or physical aids. It is performed entirely through the internal mechanisms already available to the organism. To further complicate the matter, the change does not typically begin in the genome, unless that is where the pressure exists the most. The change may originate through cognitive functions: having an immensely strong willpower, for example; or the possibility that a heightened realization of self could influence change; and memory may play a role, since this is a "guided" effort. I quote guided because although an example of adaptive mutagenesis may indeed be endogenous, there is always the question of whether the organism was conscious of its effort, or if it were simply a natural process all along. Either case would be sufficient evidence. Unfortunately, there is not much support yet for adaptive mutagenesis. It is certaintly an interesting avenue of study, but with no known instances of the event -- either natural or in experimentation -- it is impossible to study the phenomenon directly, if it indeed exists. The strongest case against AM, in my opinion, is the sheer randomness of mutations. In my wholly unprofessional and less-than-academic opinion, evidence for AM should at least be partially reflected by an imbalance in the disposition of mutations within a specific rate. To my knowledge, no such imbalance has been observed (yet). Still, there may be compelling evidence elsewhere, and it is just as likely we have not yet observed this event. A third option is that AM has a very minor influence, and is easily missed over the vast timeline of biological evolution. Perhaps Prometheus could shed some more light here. Or we can start a new thread, because there is quite a bit of ground, including a discussion of epigenetics, that I've yet to cover here, and I don't want to derail the thread anymore than it may already be. Tu ne cede malis, sed contra audentior ito. | ||
| | |
| | #78 (permalink) (top) | |
| BANNED: Repeated insults Posts: 4,828 | Quote:
Could one argue for a modified AM? After all evolution has been going on for some time now and the most common mechanisms for change within species is not the outright replacement of genes but the modification of genes. Arms become wings, feathers become hair and so on. Could it be possible that over time there could be a buildup of genetic combinations that could easily change back to a previous configuration in a much faster way than the changes needed to create the original set of traits from the more ancient species? That in some sense AM is taking place when change is driven by not only the environment but what was in the genome from the past? Starboy | |
| | |
| | #80 (permalink) (top) |
| Glad to be back! Location: Vernal, UT Posts: 1,725 | I have never liked the idea of adaptive mutegenesis. I have explored it, but don't consider it's evidance to be all that compelling. It's fallacy is cause and affect. Biological systems cannot deduct the proper evolutional avenue, they can only use trial and error - selective mutigenesis. I don't even think that human intellegance could be considered AM because it is not passed on through heredity, which is stipilated as part of allelic evolution. Fixed ideas are like a cramp in the foot - the best remedy against it is to tread on it. -Søren Kierkegaard |
| | |