Lil' Timmy
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- Oct 14, 2003
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hey, coolio i hope i've been civil enough, i'll be better if not
btw, not that i'm an expert, but i thought i could help out your understanding of evolution a bit. you're sorta describing 'acquired traits' which has been shown to be false. instead a fairly good description of your cows (imho ) would be:
1) cattle graze happily graze in the meadows. due to naturally occuring slight genetic variation, some of these cows have longer hair, some have shorter hair. some have longer legs, some shorte legs, some bigger horns, some smaller, and so on..
2) :O most of the cattles food has disappeared due to a plant virus! some the hungry cattle, in search of food, climb into the nearby rocky hills. now due to that natural genetic variation i mentioned, some of these individuals have somewhat tougher hooves than others.
3) because the tough hooves allow certain individuals to climb better/longer/to more places than others, these individuals become better fed, and remain in better shape. because of this, they are generally more fit, and able to raise healthy young better. (for simplicity's sake, we'll ignore the other selective advantages from things like thicker coats..)
4) those offspring of course can inherit their parents 'tough-hoof' genes, and they benefit from the same advantages over their piers as their parents did.
5) this process of "microevolution" would continue as long as there is a selective advantage to having tougher hooves. and given enough time could result in a population of hill-cattle (we'll call 'em goats ) that are genetically distinct enough from the original meadow population that they can no longer reproduce with meadow cattle to produce viable offspring.
it's heavily simplified, but a passable description given the situation. any questions?
btw, not that i'm an expert, but i thought i could help out your understanding of evolution a bit. you're sorta describing 'acquired traits' which has been shown to be false. instead a fairly good description of your cows (imho ) would be:
1) cattle graze happily graze in the meadows. due to naturally occuring slight genetic variation, some of these cows have longer hair, some have shorter hair. some have longer legs, some shorte legs, some bigger horns, some smaller, and so on..
2) :O most of the cattles food has disappeared due to a plant virus! some the hungry cattle, in search of food, climb into the nearby rocky hills. now due to that natural genetic variation i mentioned, some of these individuals have somewhat tougher hooves than others.
3) because the tough hooves allow certain individuals to climb better/longer/to more places than others, these individuals become better fed, and remain in better shape. because of this, they are generally more fit, and able to raise healthy young better. (for simplicity's sake, we'll ignore the other selective advantages from things like thicker coats..)
4) those offspring of course can inherit their parents 'tough-hoof' genes, and they benefit from the same advantages over their piers as their parents did.
5) this process of "microevolution" would continue as long as there is a selective advantage to having tougher hooves. and given enough time could result in a population of hill-cattle (we'll call 'em goats ) that are genetically distinct enough from the original meadow population that they can no longer reproduce with meadow cattle to produce viable offspring.
it's heavily simplified, but a passable description given the situation. any questions?