sanja wrote:Another one:
franko wrote:I have two more questions, from the set of those I take for more significant. One is -life. What is it, in fact? The second is about term "create".
Life is basically chemistry writ large, self replicating, metabolising, and mutable. For a classical treatise on the subject I would recommend Schrodinger's "What Is Life" which includes a physical treatment of life.
Something about creation.
I think that different progresses, different developments, are based on two things:
1. gradual improvings - I would call that evolution;
2. leaps - I would call them creations.
Evolution does not distinguish between the two, since genetic/genomic changes still account for phenotypic changes regardless of the extent of change, I will attempt to provide links to some of the other posts I have made in this forum showing how small genetic changes can have dramatic effects. The point to be noted there is that there is no implied or real correspondence between the scale of mutation and the expected phenotypic change.
In other words, Occam's Razor would have you dump the distinction.
The idea is this
[1] Both morphology and physiology are controlled by genes
[2] This happens through interactions of genes and gene products (Proteins, ncRNA et cetera)
[3] The process of mutation can act on all genes (hence no distinction)
[4] Gene mutations cause phenotypic changes,which fall under the remit of [1]
[5] Phenotypes are subject to selection and since fitness is relative mutant phenes lead to differential survival or may have no impact, in which case they are said to be neutral.
To "make a man out of dast" is, of course, I take for unreasonable, but, the idea of different creations which would be brusquely, with a leap, surprising and pretty fast - that might be possible, IMO.
No distinctions required here inasmuch as the causal processes are concerned, firstly, since the processes of mutation are evidentially supported and parsimonious and this covers both possibilities, secondly, fast evolution would still operate within the evolutionary paradigm, so a distinction would be superfluous to requirements.
Just to give you an idea, mutations can go from point mutations, where just one nucleotide is altered, to whole genome duplications, where whole genomes are duplicated (doubling of the material available for further mutation and evolution)
In between there are processes such as gene duplication and supernumerary chromosome formation and transposon activity which all have varying extents of genomic change, which of course doesn't say anything about the extent of phenotypic change at all.
This kind of thoughts occured in me during different events. These are some of them, and if someone is interested, I could explain a bit more:
- Once I realised that I am making leaps development in one sport;
- by leaps development, I became a carpenter (amateur carpenter, but still, a carpenter)
- machines are developing tnat way, we are getting to new knoledges thatway;
- the history of mankind is full of leaps developments;
So I figured that is a some kind of law, sometimes obvious, sometimes not. That fostered me to comprehend evolutin in the simmilar way, and that leaps do not seem strane to me, just opposite.
Opposite? Not sure that is correct, it is part of what is evolutionarily possible, of course.
That kind of thinking brought me to another question:
In the moment of a leap, does something necessarily goes down?
(damn, I am sooo not sure about this translation )
You've lost me there, Sanja.
But if he's asking when speciation should occur if there can be any drawback I can foresee one thing, increased chances of inbreeding which may allow the expression of deleterious recessive alleles, being something of a selective disadvantage, but Susu or someone should be able to expound evolutionary dynamics much better than I can, I'm a biochemist/biotechnologist and not a full time evolutionary biologist.
Evolution always has that cleavage, some population which separates, one part stayes the same, and the other, let's say, goes on. I choosed to say "goes on", though, I could say just "outshines".
My conclusion would be this:
Gradual development - different things are developed within one unit.
That development brings to possibility for "the leap" which, basicly, stands on arrangement of elements.
In that leap, something makes fast progress, and something else stops, or even vanishes.
Separated population "overgrows" previous one, so it can be possible that they are not even competing.
No, it does not "always" have that cleavage.
Speciation is one of the things that happens due to evolutionary processes, but it isn't an inevitable consequence as long as interfertility is maintained. It also appears you aren't very clear about how selection works, it works by eliminating mutations that reduce survival, this is called purifying selection. There will also always be competition because organisms produce more offspring than is sustainable, among other things, the work of Malthuus (sp) is especially relevant here, just as it was when Darwin came up with his
magnum opus "On the Origin of Species..."
Regarding your conclusion, all I have to say is that while that is one of the ways evolution can progress in, it isn't the way in which it inevitably does, this is because one of the central elements underlying basis of evolution, aka mutation, is
stochastic, or random, in a scientific sense.
I really do not know how to traslate "law" differently. In our language, we use "law".
Maybe "regularity" would be better word?
Certainly better than law.