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Quote:Quote:evolution is caused by the environment As EJN said, not necessarily. Evolution can occur in the absence of environmental change, via genetic drift. Further, even when a species is forced to adapt to a changing environment, it's not always predictable what direction that adaptation will take. For example, consider a mammal in a tropical environment that grows colder. To adapt to the cold, there are several solutions to the problem available. The population can grow longer warmer fur. It can grow fatter for insulation. It can grow physically larger. It can increase its metabolism to generate more body heat.None of these potential solutions is exclusive to the others, and all of them are going to carry incidental consequences -- which adds to the unpredictability of the future. So what IS the relationship between the environment and evolution? Exactly how do you define *cause* under such conditions? It's there, but it's not amenable to glib or simple statements.
Quote:evolution is caused by the environment
Quote:If you have a religiously static environment you still get evolution.
Quote:Think of sexual selection. Male peacocks have elaborately oversized tail feathers, which are probably quite dangerous to own in the wild; their ladies are drab brown, but have a liking for overly decorated males.I'm not sure how a cycle like that starts, but once it does, selection occurs even if the environment is unchanging and the original creatures are well adapted to it. The male gets to father more chicks if he has the right plumage; the female's male chicks are more likely to be successful if she selects the right male herself.
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Quote:I'm not sure I get this line of thought. If you have a religiously static environment you still get evolution. That environment will select what gene expressions work best to date, not necessarily what work best out of all possible combinations. So despite a never changing environment some mutations will occur at random that work 'better' than what has worked for eons and thus the new characteristic will allow that species to out compete its brethren which may have dominated for eons.
"After the Laws of Physics, everything else is opinion" -Neil deGrasse Tyson
Elmira-Corning Astronomical Society
Quote:But now that we've discussed selective pressure a little, I'll ask my question again: What might be the selective pressures that result in the appearance of 'mind'?
Quote:There is no forward or reverse. The only "direction" in evolution is towards adaptation to current conditions. But there's no advance prediction as to what those adaptations will be.Or whether they will succeed.
Quote:Quote:There is no forward or reverse. The only "direction" in evolution is towards adaptation to current conditions. But there's no advance prediction as to what those adaptations will be.Or whether they will succeed. Well it seems obvious to me Humans have been evolving in reverse for maybe 100 years now. By this I mean the fact that so many could not survive without machines and medicines created by "modern" culture, yet they continue to add to the gene pool. This weakens us as a species, not being mean here, nature doesn't know what cruel is, we made that up. In reality, the fitest survive and spread genes, but humans have found ways around that...for now.
Quote:Again, and I can't repeat it often enough, there is no "true path of evolution".