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Originally posted by chocise
I see, so your fact is a theory which contains no facts.
Originally posted by skido
When I look at animal adaptation of camouflage, I just cant believe it is possible through natural selection. There should have been some kind of environmental feedback..
Originally posted by chocise
I love these threads but don't wish to get embroiled in yet another, so I just want to make a small contribution directed at Nygdan as he was the first poster here to pedal a much drafted response which continually gets a voicing but has no validity or truth in it.
Originally posted by Nygdan
Evolution is a fact
Nygdan please, evolution is not a fact, it's a theory.
There are few, if any, facts in it.
It's a nice idea to line all your flora & fauna up and morph likenesses into some imaginary tree of life but the reality is, I'm afraid, very different – your tree is more akin to a web, and a web with many glaring holes in it.
This is why there is, a continues to be, much ongoing research, study & debate on the subject.
It's interesting to note that as genetics brings true science to biology, and was once hoped it would validate its central claim, it has only moved the goal posts and raised more questions than it's answered.
Not a bad thing as it has reignited claims made by the theory and continues to stimulate debate and further research.
Originally posted by vasaga
Ok. Let's take a step back here. What is life?
-.- Fine.. I'll answer your prior post, but I expect a definition of life from you afterwards.
Originally posted by rhinoceros
Originally posted by vasaga
Ok. Let's take a step back here. What is life?
Let's do that after you've addressed my arguments. Or.. if you want.. you can just google definition of life (I'm pretty sure it has been discussed here multiple times as well) and then address my arguments.
Hence why I asked you the question, what is life..
Originally posted by rhinoceros
Movement is not a property that defines life by itself. Water moves along a vertical gradient. Does this imply that water is living?
For extended periods of time, yes.
Originally posted by rhinoceros
Don't lose any function apart from being able to synthesize almost any new protein (or respond to almost any alternating variable) which is essential for normal function.
O.o Isn't the nucleus a component of a cell?
Originally posted by rhinoceros
It's not any component. It's the genetic material. This does not imply irreducible complexity.
Yes.. Lol.. If they remove your arm and leave you bleeding, and you die, it does not mean that you can't live without your arm. It means you can't live without blood. Same as the cell. It doesn't mean it can't live without genes. It means it can't live without proteins.
Originally posted by rhinoceros
So, now "not dying immediately" = "surviving just fine". Interesting..
The gene monitors its end product? O.o Not sure I follow.
Originally posted by rhinoceros
There are many different types of regulatory mechanisms. An example of autoregulation is, when a gene controls its own transcription by monitoring the level of its end product (protein) in the cell.
No they don't. All you've described is what genes produce under certain circumstances.. It doesn't mean they control anything.. Sadly, you can't read the whole paper without paying, but, this is the abstract:
Originally posted by rhinoceros
For example when there's a lot of proteinA in the cell, the transcription of geneA is blocked straight on DNA by an interaction of proteinA with proteinB which may for example form a complex that binds to DNA upstream of geneA blocking its transcription. Likewise a gene may for example produce mRNA all the time, but regulate it's translatation. So for example if there's a high level of proteinC in the cell, some of it may bind on mRNAC blocking its translation. Only when levels of proteinC go down, some mRNAC is free to be translated and again levels of proteinC go up. These are simplified examples, but nevertheless demonstrate that genes can (and do) control themselves
In describing the flawless regularity of developmental processes and the correlation between changes at certain genetic loci and changes in morphology, biologists frequently employ two metaphors: that genes ‘control’ development, and that genomes embody ‘programs’ for development. Although these metaphors have an admirable sharpness and punch, they lead, when taken literally, to highly distorted pictures of developmental processes. A more balanced, and useful, view of the role of genes in development is that they act as suppliers of the material needs of development and, in some instances, as context-dependent catalysts of cellular changes, rather than as ‘controllers’ of developmental progress and direction. The consequences of adopting this alternative view of development are discussed.
"When a gene product is needed, a signal from its environment, not an emergent property of the gene itself, activates expression of that gene."
Originally posted by vasaga
reply to post by madnessinmysoul
Why are they necessary? What is their function?edit on 22-3-2011 by vasaga because: (no reason given)
Yes.. But.. The genes do not control the cell, which is where I was trying to get to.
Originally posted by Maslo
Originally posted by vasaga
reply to post by madnessinmysoul
Why are they necessary? What is their function?edit on 22-3-2011 by vasaga because: (no reason given)
To manufacture proteins. It is like saying that human does not need to eat to live. Sure, you will survive for some weeks, but that does not mean you can live without food. Nucleus is essential for the cell.
Originally posted by madnessinmysoul
There is no debate. You are fabricating issues with evolution that aren't there. I'd like to see you provide some external sources to verify your repeatedly debunked claims.
Originally posted by john_bmth
reply to post by chocise
That's because you choose to dismiss evidence that conflicts with your world view. Call it stubborn, call it ignorant, call it what you like.