Talk is cheap and so are examples.
You are right. Teh cause doe snot matter, but he lack of the ability to breed is ot a mechanism for evolution. The salamaner is still a salamander.
First, it is not a lack of ability to breed. They can easily breed within their own groups and with their neighbors (except the ones that came from the other side of the obstruction). It is an incompatability with that one other group.
Second, it is not a
mechanism for evolution, it is a
result of evolution. The adaptation that the population on the east side underwent was diffrent from the adaptation that the population on the west side underwent.
Third, yes, a salamander is a salamander. A gull is a gull. A Greenish Warbler is a Greenish Warbler. A horse is a horse, of course, of course. They are also evidence for evolution
I don' think I accused you of that.
No, you didn't. At least not directly. But you implied that mutation is the main driving force of evolution, which it is not.
There may not be more. The mutation may not be present in the next gneration. Even if it is in all the next generation, th species does not change.
True, but trivial. The mutations that do "take" will spread though the population as I said, and will be available as variations for adaptation as I said.
Environment is not a mechanism for a species too change.
You yourself provide a counter-example later in this same paragraph (the strong-legged rabbit) which disproves this statement.
It may make a species becomeextinct but it will not make them evolve into a different species.
We have seen species split off from other species. Even most Creationsts have accepted this and have abandoned the kind = species stance.
Same with natural selection, which has never been proven.
What do you think Natural Selection is? Your rabbit example in the next sentence is practically the
definition of Natural Selection.
The rabbit with the stroenge legs may keep that species from becoming extinct, but it will never make it into anything other than a rabbit.
No it won't. But Evolution does not say it will.
Also, because of the gene mix, the stronger legs are not guarented in the next generation.
k
No it is not guaranteed, but since more strong-legged rabbits survived to adulthood to mate than weaker-legged rabbits, more of the warren will have inherited the stronger-leg gene. As long as the environment strongly favors stronger legs, each generation will have a higher percentage of strong-legged rabbits. There is a non-trivial chance that the weaker-legged gene will die out. If the environment no longer favors strong legs as highly, and the weaker-leg gene has not died out, it may begin to reassert itself. But if it has died out, it will take a new mutation -- which will not be the same as the old gene -- to produce the weaker leg again.*
*I wish you had chosen another trait, such as a heavy coat. Traits become favorable or unfavorable depending on the environment, and in general are not better or worse, except in relationship to those requirements. This is more obvious in a trait like a heavy coat, which is good when its cols, but bad when its hot, than in muscle strength, which we are prejudiced to se as "objectively" better than weakness.