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i will not have my 5033 be over taken by idoits that post numbers.
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Originally posted by: DanielB
Shimraa, you're talking about things that don't exist, and there's no evidence of them existing either. You're right, the fundamental form of life is the cell. Even ignoring that, a virus does not perform the necessary functions of life. It is a non-living thing. It performs operations out of necessity only.
Anyhow, I’ll explain, if I must, to you why such a virus could not exist. Because it wouldn't be able to reproduce, end-of-story. If it fused with a cell, then it can't infect other cells, it can't spread. I find the idea of a single cell's DNA changing effecting the whole completely ludicrous.
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Anyway viruses are not, by the current definition of life, alive. (Correct). However they have many, not all, but many characteristics of life. they 'evolve'; that is why you have a different form of influenza every year, (yes) they feed, once they are in a cell NO. (They don’t feed. They use the cell’s machinery (Transcription and Translation) to produce more viral particles), the virus will use the food the cell makes to replicate (actually they use the cell’s energy molecules such as glucose as a source of energy to be able to accomplish their goal of producing more viral particles). Parasites which are a form of life follow this exact same proccess, (correct) however they are made up of cells and most can break down very simple forms of food. they still require there host to provide all these things though. they are like larger living examples viruses. you are incorrect in saying that viruses cannot survive without a cell. this is true from some viruses like HIV however it is not true for others which will remain intacte for long peroids of time outside of a cell (you are correct. Some viruses can survive for long periods outside of a cell). and you stated that a cell can survive without the virus, once a cell has been infected it cant survive without the virus. the reason viruses are not defined as life is because by definition the fundimental form of life is the cell, and since viruses are not made up of cells the can't be called life even if they fill many of the other requirements, that is why viruses are not defined as living. (Remember viruses don’t grow nor do they respire, two characteristics generally associated with living cells). IF this definition were changed which can happen very easily then viruses could be called life. there is a push in the world of science now to change this definition,(true – my personal opinion is that the definition does need to change). these scientists propose that nucleic acids should be defined as the fundimental form of life. however, that is beside the point when i said that viruses could have been involved in evolution the theory ( - current thought is that they have been interlinked in evolution for a long time). spans from the fact that viruses can substantially change the DNA make up of a cell, it could be possible that at some point in the past there was a virus which would fuse itself with the cells DNA rather then take full control of the cell it would become a part of the cell and change it, in this way when the cell reproduced it would create a much different form of life. so even thou viruses are not currently defined as life they still could have affected evolution in the method decribed above. (True, therefore the argument goes that if they have affected evolution in such a way, which is very plausible, then we need to rethink the definition of life.)
Hope this helps.
Call me when you’re in town.
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Do you have any idea how many scientific laws have to be broken to allow the theory of evolution to float? Genetic mutations have never been observed to be beneficial. They're neutral at best, or they just loose the genetic information already present. Now Darwin tried to explain this with what he called "survival of the fittest". He theorised that the bad genetic mutations would die out and only the beneficial ones would live on. How come we haven't observed this? Usually when a genetic mutation occurs, good or bad, it eventually weeds its way through the entire species. If that observation is true, as it appears to be, than it means much more harm than good occurs from mutations, and so we shouldn't expect good results to flow.
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Nevertheless, even if the theoretical origin of life does assemble itself, AND survive (I won't bother detailing the reasons why survival is blatantly impossible) - how is it going to replicate? Can it reproduce? No it can't. It can't grow, it can't create more-cells it can just live and sustain itself and that's about it. The theory of evolution requires reproduction - or it couldn't occur. So how did THAT evolve? Simply stated, it couldn't have. But let's say it did, and you've got your single-cell bacterium replicating itself, and re-arranging its genetic code to adapt to new environments and alike. Of course, it has to be able to adapt very quickly to climate changes as the Earth cools, but apparently it did. Now it's time to evolve into a higher form of life. Perhaps one where reproduction occurs between two different sex's of the same species. How is it going to do this? I mean it's happily been reproducing asexually, how is it going to rearrange its code to allow reproduction to occur between two different specimens of the species? What a load of rubbish!
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But apparently it happened. Okay sure, why not? Maybe now it's simple useless floating around isn't doing much good anymore, and because it evolved into having different sex's it now needs to move around freely at will (or, it needs to move around freely at will because it intends to create different sex's). What does it need first? A Brain? A Heart? A Central Nervous System? Veins? Arteries? Blood? Kidney? Lungs? Stomach? Acid? Skin maybe? Which is it going to start with? If it evolved a heart, than it's a useless organ that's just taking up valuable space and resources. Darwin's theory of the fittest claims it dies out. What about blood? Well that's useless too without anything to use it with. So you see, life is so complex that it can't be reduced step-by-step. Heck we can't design cameras as advanced as the human eye. Sure we can magnify it, but that's about it. The brain stores information more reliably, and more solidly than any form of data-storage we've designed.
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Originally posted by: StarboyQuote
If you assume the atom as the starting point and look at the present, then biology must be increasing in order. But if you look at things like rate of extinction compared to rate of species generation...or increasing cancer rates (that is, the harmful mutation of DNA)...and trace that line all the way back to origin, it points to a MORE complex biological history rather than a less complex biological history.
Forgive me i dont understand your logic here. What points to a more complex biological history?
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If you assume the atom as the starting point and look at the present, then biology must be increasing in order. But if you look at things like rate of extinction compared to rate of species generation...or increasing cancer rates (that is, the harmful mutation of DNA)...and trace that line all the way back to origin, it points to a MORE complex biological history rather than a less complex biological history.