While the idea of evolving the ability to evolve faster might be made to work, it needs to be spelled out carefully, lest it attribute foresight to evolution.
Ordinarily you have trait X and you say it increases fitness and goes to fixation in a population, but it’s less obvious how this works with the trait of evolving faster… which is not to say that such a thing is impossible. But you might need to invoke differing long-term survival of large groups of species, or something...
Nerve cells most likely evolved for a different purpose, high speed communication. Adaptivity of this network improves fitness because even when you are in one body you don’t know how big it is (it grows), so you need to send different signals for different size bodies. Also if you can link in extant sensors used for chemotaxic or phototaxic behaviour and use this information in the high speed network without having to re-evolve the behaviours, then you can gain fitness advantages.
I’m saying it smooths out the curves of the search space that evolution is moving in. Rather than having discontinuous jumps between the fitness of (lack of eye, no information processing for eye) and (light sensor, genetic adaption for processing the information from the light sensor), you get the step of (light sensor, some system that can do something with the information) in between. Getting both together is unlikely.
In this respect it plays a similar role to hox genes. Getting symmetrical legs for locomotion (or wings for flight) is unlikely unless you have a modular system.
Rather than having discontinuous jumps between the fitness of (lack of eye, no information processing for eye) and (light sensor, genetic adaption for processing the information from the light sensor), you get the step of (light sensor, some system that can do something with the information) in between.
Yes, this kind of selection for general learning ability is known as the Baldwin effect.
While the idea of evolving the ability to evolve faster might be made to work, it needs to be spelled out carefully, lest it attribute foresight to evolution.
Sex seems to fit the bill here. Clades which reproduce sexually are able to evolve more rapidly in response to changing environments, and the trait of sexual reproduction becomes established in the biota.
While the idea of evolving the ability to evolve faster might be made to work, it needs to be spelled out carefully, lest it attribute foresight to evolution.
Ordinarily you have trait X and you say it increases fitness and goes to fixation in a population, but it’s less obvious how this works with the trait of evolving faster… which is not to say that such a thing is impossible. But you might need to invoke differing long-term survival of large groups of species, or something...
Nerve cells most likely evolved for a different purpose, high speed communication. Adaptivity of this network improves fitness because even when you are in one body you don’t know how big it is (it grows), so you need to send different signals for different size bodies. Also if you can link in extant sensors used for chemotaxic or phototaxic behaviour and use this information in the high speed network without having to re-evolve the behaviours, then you can gain fitness advantages.
I’m saying it smooths out the curves of the search space that evolution is moving in. Rather than having discontinuous jumps between the fitness of (lack of eye, no information processing for eye) and (light sensor, genetic adaption for processing the information from the light sensor), you get the step of (light sensor, some system that can do something with the information) in between. Getting both together is unlikely.
In this respect it plays a similar role to hox genes. Getting symmetrical legs for locomotion (or wings for flight) is unlikely unless you have a modular system.
Yes, this kind of selection for general learning ability is known as the Baldwin effect.
True it fits the definition, as long as you allow “change in the environment” to be change in a different gene.
Sex seems to fit the bill here. Clades which reproduce sexually are able to evolve more rapidly in response to changing environments, and the trait of sexual reproduction becomes established in the biota.
This might explain the maintainance of the trait better than how it came to arise in the first place… but maybe that’s good enough.