I think the puzzles you keep running into, Mike, come from an image of the lone organism, a person, struggling heroically against their environment. Now you've even taken to treating Life as if it were a single entity doing stuff like adapting and surviving. There's not a single rock falling down the well but trillions. Evolution is a statistical phenomenon. It's all about populations. — Srap Tasmaner
Hi Srap Tasmaner. Thanks for your reply.
The point you put forward is that we, at present, have so many variants and instances of life that at least some of them will continue to ring a mathematical harmony for billions of years as they fall. Some lifeforms drift out of mathematical harmony and are lost from existence, while others continue to randomly correct the drift and propagate. It's a strong evolutionary position to take.
I will try and use evolution and statistical phenomenon to reply.
If life arose out of nothing, unless the suggestion is that it did not have a single source origin, then in order to get to the point where there is a field of balls falling through a field of bells, quite of lot of population growth and differentiation had to happen. Life would have to pass through a long and sustained bottleneck of survivability due to a lack of variance, population, and refined systems.
A single arrow of life has been shot through time, not many. A system of molecules that just so happen to replicate themselves have formed a mechanical system so elaborate that not even the finest 'watch maker' on earth could match it for complexity.
The amount of successful and very difficult and often simultaneous steps required for this first lifeform to form are so numerous that even in the face of proof to the contrary, we would think that rational scientists should steadfastly refuse to believe in life’s existence, based on nothing more than statistical magnitude of improbability of this first step occurring.
If we grant that life did evolve naturally, and overcame the bottleneck of invariance, population and lack of exact specificity to the environment, so that it was perfectly adapted, then as the initial reactants that were driving life fell, life should have drifted out of existence. The system sustaining the initial populations should have disintegrated and returned to random motion. The statistical likelihood of such a response is extremely high.
To use an illustration: If, in our laboratory, we had a system of finely calibrated molecules dependent on each other and on a reactant we are adding to their environment, then we would not expect that removal of the reactant would cause a conformational or biophysical change in the molecules so that they now started using the glass of the test tube as the reactant in order to sustain their cycle.
However, such a change did occur, and more. Instead of drifting out of existence once the reactant was used up, a very fortunate coincidence, at this very instance in the evolution of lifeforms, occurred. Copying errors in the DNA underpinning their creation meant that flagella and chemoreceptors popped up and that allowed the ‘search’ for new reactants to occur. Life diversified.
Further mutations to the metabolic processing cycles and the specificity of transmembrane proteins as well as second messenger cascades, also allowed for an adjustment to new chemical environments.
All of this occurred without the primary molecular cascades being disrupted (for that would be death).
Statistically, there are several separate things to consider. The likelihood that such random mutations would give rise to such elaborate features, AND the statistical likelihood that such mutations would then occur at the exact time they were needed AND that these huge mutations and metabolic shifts did not destroy the initial chemical cycles that were defining life.
AND Of course, even before that is the statistical improbability that life would arise in the first place. Remember, there is no intentionality to life. It is all random.
And then there is the mathematical statistics I opened this OP with. Without intentionality or some type of invaginated terrain over which life is running, then mathematically speaking we would expect to see disorder punctuated every so often with order. This order would be nothing more than the expected anomalies from an underlying random motion – the monkeys on typewriters. Life, even if it did blow wide open for a while, should have narrowed and ultimately disappeared in the billions of years of its repeating pattern. Life should not have survived.
If we now move to the science of physics we see that life is statistically very improbable because it depends on the locomotion of a system through space to source reactants to support a system that is anti-entropic and dependent on random mutations matching precisely against a changing environmental terrain in order to sustain and propagate itself. Such a system is surely facing massive selection pressures against its existence. Survival of the fittest suggests that life should not survive.