Cirdan said:
Evolution is a description of how changes in genetic code occurs. Natural selection describes how, through increased survival /and or greater reproductive success, the genetic change is promugated throughout the population. Is is not the your definition is wrong, but that it is too limited and focuses on only a part of selection aspect.
It's s true that we have been using the term 'Evolution' in this thread where we should have been using Natural Selection. Evolution is the result of the changes infused into the species through, primarily, the process of natural selection. However by its very nature, natural selection only has one focus and that's the increased reproductive capacity of the organism - the organisms that survive longer are the only ones with that evolutionary advantage to pass on more of their genes to the next generation.
Cirdan said:
Some adaptations can have multiple uses. The result of adatations may lead to greater survival, with the extended period of reproductive opportunity a secondary benefit. Adapatation is the lgoical product of evolution. Reprodutive tactics are subordinate to the adaptation aspect. A species can evolve without improving it's reproductive success. Other species have sacrificed reproductive success for greater adaptability.
If an adaptation has no tangible benefit to the animal's reproductive success, then its subesquent transmission to the next generation will be random and will likely never become a global characteristic of that species. It is the adaptation that is a tool of Reproduction, not the other way round. If the new adaptation has no benefit on reproductive success then the adaptation is not a result of Natural Selection.
Species that may have sacrificed reproductive
potential for greater adaptability would nevertheless have done so to advantage the species' reproductive capacity in some way. Natural Selection does not think and 'more babies' is the only way it can have an effect.
Cirdan said:
It is possible that an adaptation to have less offspring could improve the population overall when resources are declining due to over-population. This is a critical point. It is the effect on the population of heritable changes that matters and not the evolution of single entities.
Evolution refers to changes at the species-level, not the individual level. Natural Selection accounts for these species-wide changes on an individual scale. The overall effect is still on the population.
Cirdan said:
A goal is something cognizant beings act upon. Theories lack goals, motivation, or will, they just are. The theory of gravity, for example, doesn't have as it's goal, attracting object with mass to one another. It merely describes the causes and effects.
For an inanimate process, goal vs result depends on your perspective. ABS brakes don't have motivation either, but their purpose can be likened to a goal. Makes the language more interesting.
Cirdan said:
Also, the bit about "genetic error" is funny since the theory requires errant genetic replication (mutagenesis).
All genetic changes leading to evolution through natural selection are "errant genetic replication". That's the fundamental base of the theory - if there were no changes, well there couldn't possibly be any changes, could there?
Cirdan said:
Oh, and sorry I haven't gotten around to reading
all your posts yet.
It was in this thread.